Clinton up 12 points in national poll
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Hillary ClintonHillary Diane Rodham ClintonBiden flexes presidential muscle on campaign trail with Virginia's McAuliffe Shontel Brown gaining ground against Nina Turner in Ohio: poll Biden hits trail for McAuliffe in test of his political brand MORE has pulled out to a 12-point lead over likely general election rival Donald TrumpDonald TrumpTrump hails Arizona Senate for audit at Phoenix rally, slams governor Arkansas governor says it's 'disappointing' vaccinations have become 'political' Watch live: Trump attends rally in Phoenix MORE in a new poll.

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The ABC News/Washington Post poll released early Sunday shows Clinton with 51 percent support among likely voters, compared to Trump’s 39 percent.

In May, Trump, the presumptive GOP presidential nominee, held a 2-point lead over Clinton, the presumptive Democratic nominee, in the same poll, 46 to 44 percent.

Clinton has a 10-point lead in the new poll when third-party candidates are added to the equation. She has 47 percent support in that scenario, Trump has 37 percent, Libertarian Party 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 7 percent and the Green Party’s Jill Stein has 3 percent.

Pollsters also found that 66 percent of registered voters think Trump is unfairly biased against groups such as women, minorities and Muslims. Sixty-eight percent think Trump’s comments about the heritage of the judge overseeing lawsuits against Trump University were racist.

A majority of voters, 56 percent, also disapproves of Clinton’s handling of her email while secretary of State.

The poll of 836 registered voters, conducted between June 20 and 23, has a margin of error of 4 percentage points.

The race for the White House is much closer, however, according to an NBC News/Wall Street Journal poll also released Sunday morning. Clinton has a 5-point lead over Trump in that survey. 

— This report was updated at 10:50 a.m.