NEW YORK, June 14 (Reuters) - Hillary Clinton's lead over Donald Trump in the U.S. presidential race has narrowed since late last week, according to the results of the first Reuters/Ipsos poll conducted since the Orlando shooting rampage on Sunday.

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Trump, the presumptive Republican nominee for the Nov. 8 election, has blamed Democratic policies for the worst mass shooting in U.S. history and doubled-down on his pledge to ban Muslim immigration, while Clinton has warned against demonizing Muslim-Americans.

See images of Orlando memorials around the world:



34 PHOTOS Orlando massacre vigils and tributes around the world See Gallery Trump gains slightly on Clinton after Florida attack - poll People gather in front of the US Embassy in Copenhagen to remember the victims at the nightclub Pulse in Orlando Florida on June 13, 2016. / AFP / Scanpix / Jens Astrup / Denmark OUT (Photo credit should read JENS ASTRUP/AFP/Getty Images) April Ross looks at a makeshift memorial outside the Dr. Phillips Center for the Performing Arts for the mass shooting victims at the Pulse nightclub June 13, 2016 in Orlando, Florida. The American gunman who launched a murderous assault on a gay nightclub in Orlando was radicalized by Islamist propaganda, officials said Monday, as they grappled with the worst terror attack on US soil since 9/11. The Islamic State group claimed slain shooter Omar Mateen was acting as 'one of the soldiers of the caliphate in America' when he attacked the Pulse club in the Florida resort city, an assault that ended when police stormed the venue. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images) People lay flowers and light candles to commemorate victims of a mass shooting at a gay nightclub in Orlando in front of the US embassy in Warsaw on June 13, 2016. / AFP / AFP PHOTO / WOJTEK RADWANSKI (Photo credit should read WOJTEK RADWANSKI/AFP/Getty Images) People commemorate victims of a mass shooting at a gay nightclub in Orlando in front of the US embassy in Warsaw on June 13, 2016. / AFP / AFP PHOTO / WOJTEK RADWANSKI (Photo credit should read WOJTEK RADWANSKI/AFP/Getty Images) MOSCOW, RUSSIA - JUNE 13, 2016: Placards and flowers brought at the US Embassy in Moscow to pay tribute to the Orlando nightclub shooting victims. Alexander Shcherbak/TASS (Photo by Alexander Shcherbak\TASS via Getty Images) SEOUL, SOUTH KOREA - JUNE 13: Flowers are placed on a rainbow flag to remember victims of the shooting at an Orlando nightclub on June 13, 2016 in Seoul, South Korea. Omar Mateen, who had recently pledged allegiance to ISIS, died after killing 49 people early morning on June 12 at a gay nightclub in Orlando, Florida. The massacre was the deadliest mass shooting in the United States. (Photo by Chung Sung-Jun/Getty Images) People hold candles as they share a minute of silence during a vigil for the victims of the Orlando shooting in Florida, in Hong Kong on June 13, 2016. Law enforcement authorities have lowered the death toll from the weekend massacre at a gay nightclub in Orlando to 49, the deadliest mass shooting in American history, explaining that the shooter had been counted in the original tally. / AFP / ANTHONY WALLACE (Photo credit should read ANTHONY WALLACE/AFP/Getty Images) BANGKOK, THAILAND - JUNE 13: People hold a rainbow flag during a vigil for the attack at the gay club in Orlando, on Monday, June 13, in Bangkok, Thailand. (Photo by Dario Pignatelli/Getty Images) Australians gather to place candles and flags in Sydney on June 13, 2016, in solidarity with the global gay community after a gunman opened fire in a nightclub in Orlando, Florida, killing over 50 people. The Sydney Harbour Bridge was lit with the colours of the rainbow on June 13 as hundreds of Australians gathered to stand in solidarity with the global gay community after the worst mass shooting in modern US history. / AFP / WILLIAM WEST (Photo credit should read WILLIAM WEST/AFP/Getty Images) WELLINGTON, NEW ZEALAND - JUNE 13: Members of the public look on during a candlelight vigil for the victims of the Pulse Nightclub shooting in Orlando, Florida, at Frank Kitts Park on June 13, 2016 in Wellington, New Zealand. Omar Mateen allegedly killed more than 50 people and injured 53 others in what is the deadliest mass shootings in the country's history. (Photo by Hagen Hopkins/Getty Images) People gather for a candlelight vigil in remembrance for mass shooting victims in Orlando, from San Diego, California, U.S. June 12, 2016. REUTERS/Mike Blake Mourners gather under a LGBT pride flag flying at half-mast for a candlelight vigil in remembrance for mass shooting victims in Orlando, from San Diego, California, U.S. June 12, 2016. REUTERS/Mike Blake A rainbow flag is held up during a vigil after the worst mass shooting in U.S. history at a gay nightclub in Orlando, Florida, in front of the White House in Washington, U.S., June 12, 2016. REUTERS/Joshua Roberts Men stand together during a vigil after the worst mass shooting in U.S. history at a gay nightclub in Orlando, Florida, in front of the White House in Washington, U.S., June 12, 2016. REUTERS/Joshua Roberts People hold a vigil after the worst mass shooting in U.S. history at a gay nightclub in Orlando, Florida, in front of the White House in Washington, U.S., June 12, 2016. REUTERS/Joshua Roberts A rainbow flag is held up with the name of the gay nightclub where the worst mass shooting in U.S. history occured in Orlando,Florida, during a vigil in front of the White House in Washington, U.S., June 12, 2016. REUTERS/Joshua Roberts Los Angeles County Sheriff's deputies are seen behind a girl riding in a bus at the 46th annual Los Angeles Gay Pride Parade in West Hollywood, California, after a gunman opened fire at a gay nightclub in Orlando, Florida U.S. June 12, 2016. REUTERS/David McNew People pay their respects to the Orlando massacre victims during a vigil in the Queens borough of New York, U.S., June 12, 2016. REUTERS/Shannon Stapleton Two women hold each other at a vigil outside The Stonewall Inn on Christopher Street, considered by some as the center of New York State's gay rights movement, following the shooting massacre at Orlando's Pulse nightclub, in the Manhattan borough of New York, U.S., June 12, 2016. REUTERS/Mark Kauzlarich A man carries a gay pride flag at a vigil outside The Stonewall Inn on Christopher Street, considered by some as the center of New York State's gay rights movement, following the shooting massacre at Orlando's Pulse nightclub, in the Manhattan borough of New York, U.S., June 12, 2016. REUTERS/Mark Kauzlarich A man lays flowers at a memorial outside The Stonewall Inn on Christopher Street, considered by some as the center of New York State's gay rights movement, following the shooting massacre at Orlando's Pulse nightclub, in the Manhattan borough of New York, U.S., June 12, 2016. REUTERS/Mark Kauzlarich People take part in a vigil for the victims of a mass shooting at a gay nightclub in Orlando, Florida, U.S., in Sao Paulo, Brazil, June 12, 2016. REUTERS/Nacho Doce Orlando residents Arissa Suarez (L) and Malcom Crawson attend a vigil at Lake Eola Park for victims of a mass shooting at a gay nightclub in Orlando, Florida, U.S June 12, 2016. REUTERS/Steve Nesius A Boston Police Officer stands behind flowers left at a Pride Month block party, the same day as the mass shooting at Orlando's Pulse nightclub, in Boston, Massachusetts, U.S. June 12, 2016. REUTERS/Brian Snyder People attend a candlelight vigil for the victims of the Orlando attack against a gay night club, held in San Francisco, California, U.S. June 12, 2016. REUTERS/Beck Diefenbach People march down Market Street during a candlelight vigil for the victims of the Orlando attack against a gay night club, held in San Francisco, California, U.S. June 12, 2016. REUTERS/Beck Diefenbach People hold up signs in solidarity at a candlelight vigil in remembrance for mass shooting victims in Orlando, from San Diego, California, U.S. June 12, 2016. REUTERS/Mike Blake A candlelight vigil in remembrance for mass shooting victims in Orlando is held in San Diego, California, U.S. June 12, 2016. REUTERS/Mike Blake A rainbow flag is held up during a vigil after the worst mass shooting in U.S. history at a gay nightclub in Orlando, Florida, in front of the White House in Washington, U.S., June 12, 2016. REUTERS/Joshua Roberts TPX IMAGES OF THE DAY A couple puts their arms around each other outside the White House where the U.S. flag flies at half-staff at sundown as people gather for a vigil on Pennsylvania Avenue later in the day of the worst mass shooting in U.S. history at a gay nightclub in Orlando, Florida in Washington June 12, 2016. REUTERS/James Lawler Duggan WELLINGTON, NEW ZEALAND - JUNE 13: The Michael Fowler Centre is lit up in the colours of the rainbow flag after a candlelight vigil for the victims of the Pulse Nightclub shooting in Orlando, Florida, at Frank Kitts Park on June 13, 2016 in Wellington, New Zealand. Omar Mateen allegedly killed more than 50 people and injured 53 others in what is the deadliest mass shootings in the country's history. (Photo by Hagen Hopkins/Getty Images) ORLANDO, FL - JUNE 12: Candles sit on the edge of Lake Eola, June 12, 2016 in Orlando, Florida. The shooting at Pulse Nightclub, which killed 50 people and injured 53, is the worst mass-shooting event in American history. (Photo by Drew Angerer/Getty Images) Brett Morian, from Daytona Beach, hugs an attendee during the candlelight vigil at Ember in Orlando, Fla., on Sunday, June 12, 2016. (Joshua Lim/Orlando Sentinel/TNS via Getty Images) People sit by the water with candles during a vigil in a park following a mass shooting at the Pulse gay nightclub in Orlando, Florida, U.S. June 12, 2016. REUTERS/Carlo Allegri Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

The poll, conducted from Friday to Tuesday, showed Clinton with an 11.6-point lead - 44.6 percent to 33.0 percent - over Trump, down from the 13-point lead she had in the five days that ended Saturday.

The Florida attack, in which a gunman killed 49 people at a gay nightclub and wounded 53 could have a lingering impact on the presidential race, mixing concerns about immigration, gun violence and religious tolerance into what has already been a volatile and sharply negative campaign.

The shooter, Omar Mateen, 29, the U.S.-born son of Afghan immigrant parents, called authorities during the massacre to pledge allegiance to the Islamic State militant group.

Federal investigators have said Mateen, who was killed by police, was likely self-radicalized and there was no evidence he received any instruction or aid from outside groups such as Islamic State.

Trump seized on the attack to accuse Democratic President Barack Obama of failing to address "radical Islamic terrorism," to warn that Clinton's policies on immigration would allow more potential attackers into the country, and to fine-tune his call for a suspension of Muslim immigration.

In a speech on Monday, Trump said he would suspend immigration from countries with a "proven history of terrorism" against the United States, Europe and allied countries "until we fully understand how to end these threats."

Clinton, the presumptive Democratic presidential nominee, said Trump's response to the attack was disturbing.

"Prejudice, paranoia and partisanship are not a plan, and will not protect anyone," Clinton said in a statement.

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She re-emphasized her support for coordinated military action in Syria and Iraq and called for tougher controls on firearms sales.

Clinton's slip in the polling was not all Trump's gain.

The proportion of voters who said they would not vote for either candidate has risen steadily over the past week. About 22.4 percent of likely voters would not pick either candidate, according to the five-day average of results on Tuesday. That was up from 20.6 percent a week ago.

Trump's strident tone on Muslims and national security appears to have helped him in the past, at least with Republicans. He surged in opinion polls among Republicans late last year after attacks in Paris and San Bernardino, California.

According to Reuters/Ipsos polls over the past several months, a majority of Republican voters said he was their party's best choice to deal with terrorism and trusted him more than his Republican rivals to be commander in chief.

Most Republicans also support Trump's proposed ban on Muslim immigration, while a majority of Americans oppose it.

The online poll included 1,063 likely voters and had a credibility interval, a measure of accuracy, of about 3.5 percentage points.

RELATED: Trump through the years:



54 PHOTOS Donald Trump through the years See Gallery Trump gains slightly on Clinton after Florida attack - poll Donald Trump with Alfred Eisenpreis, New York City Economic Development Administrator. Sketch of new 1,400 room Renovation project of Commodore Hotel. (Photo by NY Daily News Archive via Getty Images) Donald Trump pauses in his apartment 5/20 after receiving the news that the Board of Estimate unanimously approved a 40-year tax abatement plan. Under the plan Trump will purchase and refurbish the Commodore Hotel, which closed into doors 5/18, from the Penn Central Transportation Corp. In return for his $10-million-dollar purchase and up to $100 million face-lifting investment, Trump will have no real estate taxes for 40 years.



(Bettmann via Getty Images) Real estate developer Donald Trump announces intentions to build a $100 million dollar Regency Hotel. (Photo by John Pedin/NY Daily News via Getty Images) Donald Trump stands behind architect's model of City Hall Plaza. (Photo by Frank Russo/NY Daily News Archive via Getty Images) Donald Trump and Ivana Trump attend Roy Cohn's birthday party in February 1980 in New York City. (Photo by Sonia Moskowitz/Getty Images) Donna Mills and Donald Trump during 1983 Annual American Image Awards at Sheraton Center in New York City, New York, United States. (Photo by Ron Galella, Ltd./WireImage) Donald Trump attends 38th Annual Horatio Alger Awards Dinner on May 10, 1985 at the Waldorf Hotel in New York City. (Photo by Ron Galella/WireImage) Portrait of real estate mogul Donald John Trump (b.1946), smiling slightly and facing to his right, 1983. New York. (Photo by Bachrach/Getty Images) Boxing promoter Don King holds up the arms of Mike Tyson and former champion Larry Holmes during a press conference here 12/1. Looking on is Donald Trump. The fight will be held at the Trump Plaza Hotel. (Bettmann via Getty Images) Donald Trump, real estate mogul, entrepreneur, and billionare poses in the foyer of his home in August 1987 in Greenwich, Connecticut. (Photo by Joe McNally/Getty Images) Donald Trump Jr. and Donald Trump during 1988 U.S. Open - September 3, 1988 at Flushing Meadows Corona Park in Queens, New York, United States. (Photo by Ron Galella, Ltd./WireImage) Ivana Trump and Donald Trump during Mike Tyson vs Michael Spinks Fight at Trump Plaza - June 27, 1988 at Trump Plaza in Atlantic City, New Jersey, United States. (Photo by Ron Galella/WireImage) Billionaire Donald Trump and his wife Ivana arrive 04 December 1989 at a social engagement in New York. (Photo credit should read SWERZEY/AFP/Getty Images) Donald Trump and Daughter Ivanka Trump during Maybelline Presents 1991 Look of the Year at Plaza Hotel in New York City, New York, United States. (Photo by Ron Galella/WireImage) Donald Trump attends 'Hoop-La' Special Olympics Basketball Game on June 25, 1992 at the Plaza Hotel in New York City. (Photo by Ron Galella/WireImage) Donald Trump and Joan Rivers during Opening of The Rose Room in the Plaza Hotel at Plaza Hotel Rose Room in New York City, New York, United States. (Photo by Ron Galella, Ltd./WireImage) Donald Trump touches 07 April 1993 Marla Maples stomach to confirm published reports that the actress is pregnant with his child. The two arrived for Maples appearance in the Broadway musical 'The Will Rogers Follies'. (HAI DO/AFP/Getty Images) US business tycoon Donald Trump enters the PLaza Hotel in New York past supporters 21 December 1994. Hundreds of supporters showed up at a news conference where Trump denied a New York newspaper report that the Sultan of Brunei had bid 300 million USD to buy the Manhattan hotel. (Photo credit should read DON EMMERT/AFP/Getty Images) Donald Trump and Christine Whitman during Opening of New Warner Bros. Store in Trump Plaza Casino at Trump Plaza Casino in Atlantic City, New Jersey, United States. (Photo by Ron Galella/WireImage) Donald Trump attends Marc Jacobs Fashion Show on April 4, 1995 at the Plaza Hotel in New York City. (Photo by Ron Galella/WireImage) Boxing: IBC Heavyweight Title: View of celebrity businessman Donald Trump and actor Steven Seagal seated ringside during Lennox Lewis vs Tommy Morrison fight at Boardwalk Convention Hall. Atlantic City, NJ. (Photo by John Iacono /Sports Illustrated/Getty Images) New York real estate giant Donald Trump poses in his Trump Tower office on a giant letter 'T' on May 8, 1996. (TIMOTHY A. CLARY/AFP/Getty Images) Portrait of Marla Maples and her husband, businessman Donald Trump, with their daughter Tiffany, as they pose together at the Mar-a-Lago estate, Palm Beach, Florida, 1996. (Photo by Davidoff Studios/Getty Images) Donald Trump and Ron Delsner backstage at a KISS concert at Madison Squre Garden in New York City on July 25, 1996. (Photo by Ebet Roberts/Redferns) Donald Trump attending Halloween party thrown by Naomi Campbell and Kate Moss at the Supper Club to kick off Fashion Week. (Photo by Richard Corkery/NY Daily News via Getty Images) Donald Trump open his new building at 1 Center Park West- The new Trump International Hotel and Tower. (Photo byJames Hughes/NY Daily News via Getty Images) Donald Trump and his girlfriend Celina Midelfar watch Conchita Martinez and Amanda Coetzer 07 September at US Open in Flushing Meadows, NY. (TIMOTHY CLARY/AFP/Getty Images) Celine Dion, husband Rene, Donald Trump & Ivanka Trump (Photo by KMazur/WireImage) Entrepreneur Donald Trump and Rev. Al Sharpton speak at a ribbon cutting ceremony for Sharpton's National Action Network Convention April 5, 2002 in New York City. The group aims to further the development of civil rights. (Photo by Mario Tama/Getty Images) Donald Trump and his girlfriend Melania Knauss attend the Marc Bouwer/Peta Fall/Winter 2002 Collection show February 14, 2002 during Mercedes-Benz Fashion Week in New York City. (Photo by George De Sota/Getty Images) Donald Trump at Madison Square Garden (Photo by Alexander Hassenstein/Bongarts/Getty Images) Donald Trump stands on the sidelines before the start of the AFC divisional playoffs between the New England Patriots and Tennessee Titans on January 10, 2004 at Gillette Stadium in Foxboro, Massachusetts. Temperatures have reached as low as 7 degrees in the Foxboro area. (Photo by Al Bello/Getty Images) Donald Trump, Visionary Business Leader award honoree, poses with his children Donald Trump Jr. and Ivanka at Fashion Group International's 22nd Annual 'Night Of Stars' at Cipriani's 42nd Street October 27, 2005 in New York City. (Photo by Evan Agostini/Getty Images) Eric Trump and Donald Trump attend the Chicago Bulls vs New Jersey Nets game at the IZOD Center on October 31, 2007 in East Rutherford, New York. (Photo by James Devaney/WireImage) Donald Trump delivers a speech with his son Barron after he was honored with the 2,327th star on the Hollywood Walk of Fame on Hollywood Boulevard in Hollywood, CA, 16 January 2007. (GABRIEL BOUYS/AFP/Getty Images) Portrait of former model Melania Trump and her husband, businessman Donald Trump, as they sit together at a table during the 16th annual 'Lady in Red' gala, hosted by LIFE (Leaders In Furthering Education), at the Mar-a-Lago club, Palm Beach, Florida, December 4, 2009. (Photo by Michele Eve Sandberg/Corbis via Getty Images) Donald Trump sands with Miss Universe 2009 Stefania Fernandez of Venezuela prior to the Miss Universe 2010 Pageant Final at the Mandalay Bay Hotel in Las Vegas on August 23, 2010. Miss Universe is an annual international beauty pageant and along with the Miss World is the most publicized beauty contest in the world. California clothing company Pacific Mills founded the contest 1952 and was acquired by Donald Trump in 1996. (MARK RALSTON/AFP/Getty Images) US tycoon Donald Trump arrives to speak at the annual Conservative Political Action Conference (CPAC) at National Harbor, Maryland, outside Washington, on February 27, 2015. (NICHOLAS KAMM/AFP/Getty Images) Donald Trump speaks during the NRA-ILA Leadership Forum at the 2015 NRA Annual Meeting & Exhibits on April 10, 2015 in Nashville, Tennessee. The annual NRA meeting and exhibit runs through Sunday. (Photo by Justin Sullivan/Getty Images) Real estate mogul and billionaire Donald Trump attends Golf legend Jack Nicklaus' Congressional Gold Medal ceremony in the U.S. Capitol Rotunda March 24, 2015 in Washington, DC. Trump announed on March 18 that he has launched a presidential exploratory committee. (Photo by Chip Somodevilla/Getty Images) Businessman Donald Trump speaks to guests gathered for the Republican Party of Iowa's Lincoln Dinner at the Iowa Events Center on May 16, 2015 in Des Moines, Iowa. The event sponsored by the Republican Party of Iowa gave several Republican presidential hopefuls an opportunity to strengthen their support among Iowa Republicans ahead of the 2016 Iowa caucus. (Photo by Scott Olson/Getty Images) Republican Presidential Candidate Donald Trump visits his Scottish golf course Turnberry with his children Ivanka Trump and Eric Trump on July 30, 2015 in Ayr, Scotland. Donald Trump answered questions from the media at a press conference. (Photo by Jeff J Mitchell/Getty Images) U.S. President-elect Donald Trump speaks at his election night rally in Manhattan, New York, U.S., November 9, 2016. (REUTERS/Carlo Allegri) Singer Kanye West and President-elect Donald Trump speak with the press after their meetings at Trump Tower December 13, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images) Republican U.S. presidential candidate Donald Trump poses for a photo after an interview with Reuters in his office in Trump Tower, in the Manhattan borough of New York City, U.S., May 17, 2016. (REUTERS/Lucas Jackson) Coverage of the 2016 Republican National Convention from the Quicken Loans Arena in Cleveland, Ohio, which airs on all ABC News programs and platforms. On this final night of the convention, Donald Trump accepts the party's nomination for President of the United States. (Photo by Ida Mae Astute/ABC via Getty Images) U.S. Republican presidential candidate Donald Trump reacts to an answer his wife Melania gives during an interview on NBC's "Today" show in New York, April 21, 2016. (REUTERS/Brendan McDermid/File Photo) President-elect Donald Trump speaks to reporters following his meeting with Jack Ma, Chairman of Alibaba Group, meeting at Trump Tower, January 9, 2017 in New York City. President-elect Donald Trump and his transition team are in the process of filling cabinet and other high level positions for the new administration. (Photo by Drew Angerer/Getty Images) U.S. President Donald Trump and Israeli Prime Minister Benjamin Netanyahu shake hands after Trump's address at the Israel Museum in Jerusalem May 23, 2017. REUTERS/Ronen Zvulun TPX IMAGES OF THE DAY U.S. President Donald Trump has coffee during a reception ceremony in Riyadh, Saudi Arabia, May 20, 2017.Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. TPX IMAGES OF THE DAY U.S. Vice President Mike Pence (L) and U.S. President Donald Trump appear on stage at a rally in Harrisburg, Pennsylvania, U.S. April 29, 2017. REUTERS/Carlo Allegri TPX IMAGES OF THE DAY U.S. President Donald Trump holds up a U.S. Air Force Academy football jersey that was presented to him by team captain Weston Steelhammer during the presentation of the Commander-in-Chief trophy in the Rose Garden of the White House in Washington, U.S., May 2, 2017. REUTERS/Joshua Roberts TPX IMAGES OF THE DAY U.S. President Donald Trump delivers the keynote address at the U.S. Holocaust Memorial Museum's "Days of Remembrance" ceremony in the Capitol Rotunda in Washington, U.S, April 25, 2017. REUTERS/Kevin Lamarque TPX IMAGES OF THE DAY U.S. President Donald Trump, U.S. first lady Melania Trump, their son Barron and the Easter Bunny arrive for the 139th annual White House Easter Egg Roll on the South Lawn of the White House in Washington, U.S., April 17, 2017. REUTERS/Joshua Roberts TPX IMAGES OF THE DAY Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

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