Washington (CNN) Donald Trump finally admitted Friday that "President Barack Obama was born in the United States," reversing himself on the issue that propelled him into national politics five years ago.

Trump sought to end his longstanding attempt to discredit the nation's first African-American president with just a few sentences tacked on at the end as he unveiled his new hotel on Pennsylvania Avenue in Washington.

But the issue isn't likely to die down any time soon -- especially as Trump continues to falsely blame Democratic nominee Hillary Clinton for starting the "birtherism" controversy. Clinton said earlier Friday that Trump's acknowledgment of Obama's birthplace doesn't go far enough and that he must also apologize.

"For five years, he has led the birther movement to delegitimize our first black president," Clinton said at an event in Washington. "His campaign was founded on this outrageous lie."

Obama was born in Hawaii in 1961.

Trump offered no apologies for his leading role in the birther movement and didn't explain what drove him to change his mind. The President dismissed Trump's criticism Friday, joking with reporters at the White House and saying, "I was pretty confident about where I was born."

Speaking at George Mason University in Fairfax, Virginia, Friday, First Lady Michelle Obama addressed the controversy head on.

"There were those who questioned and continue to question for the past eight years up through this very day whether my husband was even born in this country," she said. "Well, during his time in office, I think Barack has answered those questions with the example he set by going high when they low."

Rep. G.K. Butterfield, a North Carolina Democrat who chairs the Congressional Black Caucus, called Trump a "disgusting fraud."

Birtherism controversy

The birtherism controversy exploded the previous night when Trump said in an interview with The Washington Post that he still wasn't prepared to acknowledge Obama's birthplace. Within a few hours, the campaign released a statement -- attributed to his spokesman -- that said Trump now believes Obama was born in the United States.

Trump finally said the words out loud Friday morning.

"President Barack Obama was born in the United States. Period," Trump said, ignoring reporters' questions despite earlier indications he would hold a press conference. "Now we all want to get back to making America strong and great again."

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The developments over the past day were steeped in political motivations. With 53 days before the presidential election, Trump is moving into a margin of error race with Clinton and trying to broaden his appeal while maintaining his grip on the GOP base. Trump has tried to improve his dismal standing among minority voters and moderate Republicans in recent weeks, many of whom see birtherism as racially motivated and an insult to Obama.

He is also aiming to take the issue of Obama's birthplace and legitimacy off the table by the time of the crucial debate with Clinton September 26.

Trump has declined other opportunities during the past two weeks to refute his original birtherism.

When local Philadelphia TV station WPVI asked Trump on September 2 about his past statements, Trump replied: "I don't talk about it anymore. I told you, I don't talk about it anymore."

He repeated the same line when asked about it during a gaggle with reporters aboard his plane last week.

And in an interview with Fox News' Bill O'Reilly last week, Trump again said, "I don't bother talking about it."

Trump's extraordinary attempt to prove Obama was not a natural-born US citizen and was therefore not qualified to be president started on the conservative fringe but gathered momentum and became a major issue. The White House initially tried to ignore the birtherism movement as the work of conspiracy theorists, but Trump's huge media profile propelled the issue through conservative media and it eventually gained traction.

The saga only ended in a surreal and extraordinary moment in American politics when the sitting President went to the White House briefing room in April 2011 and produced his long-form birth certificate.

'Sideshows and carnival barkers'

"We're not going to be able to solve our problems if we get distracted by sideshows and carnival barkers," Obama said at the time, in a clear reference to Trump.

In his statement Thursday night, Trump spokesman Jason Miller said, "Mr. Trump did a great service to the President and the country by bringing closure to the issue that Hillary Clinton and her team first raised."

Photos: Donald Trump's rise Photos: Donald Trump's rise President-elect Donald Trump has been in the spotlight for years. From developing real estate and producing and starring in TV shows, he became a celebrity long before winning the White House. Hide Caption 1 of 37 Photos: Donald Trump's rise Trump at age 4. He was born in 1946 to Fred and Mary Trump in New York City. His father was a real estate developer. Hide Caption 2 of 37 Photos: Donald Trump's rise Trump, left, in a family photo. He was the second-youngest of five children. Hide Caption 3 of 37 Photos: Donald Trump's rise Trump, center, stands at attention during his senior year at the New York Military Academy in 1964. Hide Caption 4 of 37 Photos: Donald Trump's rise Trump, center, wears a baseball uniform at the New York Military Academy in 1964. After he graduated from the boarding school, he went to college. He started at Fordham University before transferring and later graduating from the Wharton School, the University of Pennsylvania's business school. Hide Caption 5 of 37 Photos: Donald Trump's rise Trump stands with Alfred Eisenpreis, New York's economic development administrator, in 1976 while they look at a sketch of a new 1,400-room renovation project of the Commodore Hotel. After graduating college in 1968, Trump worked with his father on developments in Queens and Brooklyn before purchasing or building multiple properties in New York and Atlantic City, New Jersey. Those properties included Trump Tower in New York and Trump Plaza and multiple casinos in Atlantic City. Hide Caption 6 of 37 Photos: Donald Trump's rise Trump attends an event to mark the start of construction of the New York Convention Center in 1979. Hide Caption 7 of 37 Photos: Donald Trump's rise Trump wears a hard hat at the Trump Tower construction site in New York in 1980. Hide Caption 8 of 37 Photos: Donald Trump's rise Trump was married to Ivana Zelnicek Trump from 1977 to 1990, when they divorced. They had three children together: Donald Jr., Ivanka and Eric. Hide Caption 9 of 37 Photos: Donald Trump's rise The Trump family, circa 1986. Hide Caption 10 of 37 Photos: Donald Trump's rise Trump uses his personal helicopter to get around New York in 1987. Hide Caption 11 of 37 Photos: Donald Trump's rise Trump stands in the atrium of the Trump Tower. Hide Caption 12 of 37 Photos: Donald Trump's rise Trump attends the opening of his new Atlantic City casino, the Taj Mahal, in 1989. Hide Caption 13 of 37 Photos: Donald Trump's rise Trump signs his second book, "Trump: Surviving at the Top," in 1990. Trump has published at least 16 other books, including "The Art of the Deal" and "The America We Deserve." Hide Caption 14 of 37 Photos: Donald Trump's rise Trump and singer Michael Jackson pose for a photo before traveling to visit Ryan White, a young child with AIDS, in 1990. Hide Caption 15 of 37 Photos: Donald Trump's rise Trump dips his second wife, Marla Maples, after the couple married in a private ceremony in New York in December 1993. The couple divorced in 1999 and had one daughter together, Tiffany. Hide Caption 16 of 37 Photos: Donald Trump's rise Trump putts a golf ball in his New York office in 1998. Hide Caption 17 of 37 Photos: Donald Trump's rise An advertisement for the television show "The Apprentice" hangs at Trump Tower in 2004. The show launched in January of that year. In January 2008, the show returned as "Celebrity Apprentice." Hide Caption 18 of 37 Photos: Donald Trump's rise A 12-inch talking Trump doll is on display at a toy store in New York in September 2004. Hide Caption 19 of 37 Photos: Donald Trump's rise Trump attends a news conference in 2005 that announced the establishment of Trump University. From 2005 until it closed in 2010, Trump University had about 10,000 people sign up for a program that promised success in real estate. Three separate lawsuits -- two class-action suits filed in California and one filed by New York's attorney general -- argued that the program was mired in fraud and deception. Trump's camp rejected the suits' claims as "baseless." And Trump has charged that the New York case against him is politically motivated. Hide Caption 20 of 37 Photos: Donald Trump's rise Trump attends the U.S. Open tennis tournament with his third wife, Melania Knauss-Trump, and their son, Barron, in 2006. Trump and Knauss married in 2005. Hide Caption 21 of 37 Photos: Donald Trump's rise Trump wrestles with "Stone Cold" Steve Austin at WrestleMania in 2007. Trump has close ties with the WWE and its CEO, Vince McMahon. Hide Caption 22 of 37 Photos: Donald Trump's rise For "The Apprentice," Trump was honored with a star on the Hollywood Walk of Fame in January 2007. Hide Caption 23 of 37 Photos: Donald Trump's rise Trump appears on the set of "The Celebrity Apprentice" with two of his children -- Donald Jr. and Ivanka -- in 2009. Hide Caption 24 of 37 Photos: Donald Trump's rise Trump poses with Miss Universe contestants in 2011. Trump had been executive producer of the Miss Universe, Miss USA and Miss Teen USA pageants since 1996. Hide Caption 25 of 37 Photos: Donald Trump's rise In 2012, Trump announces his endorsement of Republican presidential candidate Mitt Romney. Hide Caption 26 of 37 Photos: Donald Trump's rise Trump speaks in Sarasota, Florida, after accepting the Statesman of the Year Award at the Sarasota GOP dinner in August 2012. It was shortly before the Republican National Convention in nearby Tampa. Hide Caption 27 of 37 Photos: Donald Trump's rise Trump appears on stage with singer Nick Jonas and television personality Giuliana Rancic during the 2013 Miss USA pageant. Hide Caption 28 of 37 Photos: Donald Trump's rise In June 2015, during a speech from Trump Tower, Trump announced that he was running for President. He said he would give up "The Apprentice" to run. Hide Caption 29 of 37 Photos: Donald Trump's rise Trump -- flanked by U.S. Sens. Marco Rubio, left, and Ted Cruz -- speaks during a CNN debate in Miami on March 10. Trump dominated the GOP primaries and emerged as the presumptive nominee in May. Hide Caption 30 of 37 Photos: Donald Trump's rise The Trump family poses for a photo in New York in April. Hide Caption 31 of 37 Photos: Donald Trump's rise Trump speaks during a campaign event in Evansville, Indiana, on April 28. After Trump won the Indiana primary, his last two competitors dropped out of the GOP race. Hide Caption 32 of 37 Photos: Donald Trump's rise Trump delivers a speech at the Republican National Convention in July, accepting the party's nomination for President. "I have had a truly great life in business," he said. "But now, my sole and exclusive mission is to go to work for our country -- to go to work for you. It's time to deliver a victory for the American people." Hide Caption 33 of 37 Photos: Donald Trump's rise Trump faces Democratic nominee Hillary Clinton in the first presidential debate, which took place in Hempstead, New York, in September. Hide Caption 34 of 37 Photos: Donald Trump's rise Trump apologizes in a video, posted to his Twitter account in October, for vulgar and sexually aggressive remarks he made a decade ago regarding women. "I said it, I was wrong and I apologize," Trump said, referring to lewd comments he made during a previously unaired taping of "Access Hollywood." Multiple Republican leaders rescinded their endorsements of Trump after the footage was released. Hide Caption 35 of 37 Photos: Donald Trump's rise Trump walks on stage with his family after he was declared the election winner on November 9. "Ours was not a campaign, but rather, an incredible and great movement," he told his supporters in New York. Hide Caption 36 of 37 Photos: Donald Trump's rise Trump is joined by his family as he is sworn in as President on January 20. Hide Caption 37 of 37

He was referring to a controversy from the 2008 Democratic primary fight between Obama and Clinton. In a March 2008 interview with "60 Minutes," Clinton said she took then-Sen. Obama's word that he was not a Muslim, but when pressed if she believed he was, she replied, "No. No, there is nothing to base that on -- as far as I know."

Clinton, however, was not questioning Obama's birthplace.

Clinton slammed Trump's comments to the Post while speaking at a Congressional Hispanic Caucus Institute event in Washington Thursday, saying he needs to stop his "ugliness" and "bigotry."

"He was asked one more time: Where was President Obama born? And he still wouldn't say Hawaii. He still wouldn't say America. This man wants to be our next president? When will he stop this ugliness, this bigotry?" she said. "This is the best he can do. This is who he is. And so we need to decide who we are."

Clinton's campaign later tweeted, "President Obama's successor cannot and will not be the man who led the racist birther movement. Period."

President Obama's successor cannot and will not be the man who led the racist birther movement. Period. — Hillary Clinton (@HillaryClinton) September 16, 2016

The 'birther' controversy

Trump's embrace of the birther controversy seemed outlandish when it began. In retrospect, it looks like a template for the fact-challenged approach he has adopted in his presidential campaign.

After Obama's news conference, the real-estate developer claimed credit for getting the President to produce evidence of his birthplace.

"Today I'm very proud of myself because I've accomplished something that nobody else was able to accomplish," Trump said in New Hampshire, after Obama's news conference.

In subsequent years, Obama poked fun at the birtherism controversy and used it to ridicule Trump, most memorably in a savage takedown at the White House Correspondent's Dinner in 2011.

"Now, I know that he's taken some flak lately, but no one is happier, no one is prouder to put this birth certificate matter to rest than the Donald," Obama said.

"And that's because he can finally get back to focusing on the issues that matter -- like, did we fake the moon landing? What really happened in Roswell? And where are Biggie and Tupac?"