Democratic presidential candidate Hillary Clinton speaks during a rally at Louisville Slugger Field's Hall of Fame Pavilion in Louisville, Ky., Tuesday, May 10. | AP Photo National poll: Clinton leads Trump by 7

Hillary Clinton is leading Donald Trump by 7 percentage points, according to a new poll — one of the latest national surveys to show the presumptive Republican presidential nominee badly trailing his likely Democratic opponent.

Clinton earned 47 percent support in the new Monmouth University poll released Monday, while Trump took 40 percent in a head-to-head matchup omitting third-party challengers. Another 5 percent said they would support another candidate, while 6 percent said they are undecided and 2 percent said who said they would not support anyone or declined to respond.


And the numbers only get worse for Trump: Nearly six in 10 registered voters said that stopping him from getting elected president is important. And though nearly half said the same of Clinton, her advantage is undiminished when the survey sample narrows.

Among voters who described themselves as likely, for instance, Clinton leads by eight points, 49 percent to 41 percent. And in the 10 states where the margin of victory in the 2012 presidential election was less than seven points, Clinton leads 47 percent to 39 percent.

Monmouth conducted the poll from June 15-19, days after an Islamic State sympathizer slaughtered 49 and wounded dozens more at a gay nightclub in Orlando, Florida. Trump has responded to that attack by repeating his call to indefinitely ban Muslims from entering the United States, criticizing Clinton and President Barack Obama for their "weak" response to radical Islamist terrorism. Clinton has called for an "intelligence surge" and ripped Trump's comments as unpresidential.

The Monmouth poll is only the latest in a series of recent national polls showing Trump trailing Clinton. A Bloomberg poll released last Tuesday showed Clinton with a 12-point lead of 49 percent to 37 percent, while Trump himself tweeted a poll last Friday showing him losing to Clinton by only two points. The RealClearPolitics national average shows Clinton ahead by nearly 6 percentage points — a gap that has only widened since late May.

Trump's polling woes have added to a sense of siege inside his operation, with campaign manager Corey Lewandowski ousted Monday morning after clashing with family members and campaign chairman Paul Manafort.

In the Monmouth survey, Clinton leads Trump head-to-head with independents (42 percent to 37 percent), women, and people of all ages, between 18 and 34 (54 percent to 34 percent), 35 and 54 (47 percent to 39 percent) and leads within the margin of error among those 55 and older (44 percent to 43 percent). Trump leads among Republicans (84 percent to 8 percent) and in states that voted for Mitt Romney in 2012 (50 percent to 37 percent).

In a four-way matchup with Libertarian nominee Gary Johnson and Green Party candidate Jill Stein, Clinton's lead over Trump narrows slightly, 42 percent to 36 percent. Johnson, meanwhile, earned 9 percent, Stein took 4 percent, with 2 percent saying they would support another candidate, 4 percent saying they are undecided among those candidates and 1 percent who said they would not support anyone or refused to respond. Among independents in a four-way race, Trump leads Clinton 32 percent to 31 percent, with Johnson pulling in 18 percent and Stein at 8 percent.

Among registered voters, 49 percent overall said it is "very important" that Trump not become president, while another 10 percent called it "somewhat important." On the other hand, 8 percent said it was "not too important" and 31 percent said it was "not at all important." The results break down unsurprising partisan lines, with 89 percent of Democrats ascribing some degree of importance to denying Trump the White House and 76 percent of Republican registered voters who said the opposite.

For Clinton, 41 percent said it is "very important" that she not become president, while 10 percent said it was "somewhat important." Another 11 percent said it was "not too important" and 35 percent said it was "not at all important." While 89 percent of Republicans said it was important for Clinton not to be president, 83 percent of Democrats said it was not important to some degree.

Nearly seven in 10, or 69 percent, said they are certain about their vote in November, while 18 percent said they might change their mind and 13 percent said they are undecided.

Less than one-third of registered voters said they have a favorable opinion of Trump, at just 28 percent to 57 percent unfavorable. Clinton did not fare much better, with 36 percent saying they have a favorable opinion of her and 52 percent who said they did not.

Voters preferred Clinton over Trump on matters of the economy and jobs (47 percent to 44 percent) as well as on who they most trusted to handle the threat of terrorism on U.S. soil (46 percent to 44 percent).

Asked whether they supported banning all Muslims from entering the U.S., similar to Trump's temporary ban, 70 percent said they were opposed and 21 percent said they would support.

Trump tweaked his proposed Muslim ban last week to say that the U.S. needs to look at banning immigration from countries where there has been a history of anti-Western terrorism, though voters seemed reluctant to support that idea as well. While 34 percent said they would support such a measure, nearly six in 10, or 57 percent, opposed.

Via landlines and cellphones, Monmouth surveyed 803 registered voters drawn from a list of registered voters and through random-digit dialing. The overall margin of error is plus or minus 3.5 percentage points.