Poll shows Clinton with double-digit lead over Trump
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Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonBen Affleck: Republicans 'want to dodge the consequences for their actions' through gerrymandering Republican Ohio Senate candidate slams JD Vance over previous Trump comments Budowsky: Why GOP donors flock to Manchin and Sinema MORE has opened up a double-digit lead over Republican rival Donald TrumpDonald TrumpSenate rejects attempt to block Biden's Saudi arms sale Crenshaw slams House Freedom Caucus members as 'grifters,' 'performance artists' Senate confirms Biden's nominee to lead Customs and Border Protection MORE nationally, according to a new Monmouth University poll.

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Clinton is favored by 46 percent of registered voters, while Trump is backed by 34 percent. Libertarian nominee Gary JohnsonGary Earl JohnsonBiden broadened Democratic base, cut into Trump coalition: study New Mexico lawmakers send recreational marijuana bills to governor Judge throws out murder convictions, releases men jailed for 24 years MORE has the support of 7 percent of respondents, and Green Party nominee Jill Stein is backed by 2 percent.

Among likely voters, Clinton leads Trump by 13 points, 50 percent to 37 percent. In that match-up, Johnson takes 7 percent and Stein takes 2 percent support.

Clinton has increased her lead significantly compared to a poll taken in mid-July, when she held a narrow 3-point advantage over the GOP nominee among registered voters, 43 percent to 40 percent, and a 2-point lead among likely voters, 45 percent to 43 percent.

According to the new poll, 92 percent of Democrats say they will vote for Clinton, and 79 percent of Republicans say the same about their party's nominee.

Independents are divided between the two candidates, with 32 percent supporting Trump and 30 percent favoring the Democratic nominee. In the mid-July poll taken ahead of both party's conventions, Trump had a slightly larger lead among independents, 40 to 31 percent.

The poll released Monday found that 26 percent of respondents view Trump favorably and 61 percent view him unfavorably.

Clinton is viewed favorably by 37 percent of voters and unfavorably by 49 percent.

Only 27 percent of voters think Trump has the temperament to serve as president, and 67 percent say he does not, pollsters found. For Clinton, 61 percent of voters say she has the temperament to serve in the White House, and only 34 percent say she does not.

About 55 percent of registered voters feel optimistic about electing a new president, down from 69 percent who felt the same way in June 2015. The new poll also found that 46 percent of registered voters feel less enthusiastic than they have in past elections, up from 22 percent in June 2015.

The Monmouth poll was conducted among 803 registered voters from Aug. 4 to 7. The margin of error is 3.5 percentage points.

According to the RealClearPolitics average of national polls, Clinton has a 7-point lead over Trump, 47.5 percent to 40.5 percent. Several recent surveys have shown the Democratic nominee opening up larger leads over Trump.