Hillary Clinton. Theo Stroomer/Getty Images Hillary Clinton jumped to her highest level of support in a poll from Monmouth University released on Monday.

Clinton hit 50% support in a four-way race that included Libertarian nominee Gary Johnson, Green Party nominee Jill Stein, and Republican nominee Donald Trump.

It's the second four-way poll posted to RealClearPolitics that showed Clinton with 50% support.

The other was in early August, when Trump experienced a nearly identical collapse in the poll following a series of controversies. That poll was also conducted by Monmouth.

In Monday's poll, Clinton was ahead of Trump 50% to 38% among likely voters.

"Clinton has increased her lead among all registered voters, but the main difference between this month and last month is that her supporters have become more enthusiastic, and thus more likely to turn out while Trump backers have become less likely to vote," said Patrick Murray, director of the independent Monmouth University Polling Institute.

Trump's polling numbers deteriorated following the release of a tape from 2005 earlier this month in which Trump boasted about groping women and kissing them regardless of their consent.

Following the release of the tape, a score of women accused Trump of making unwanted sexual advances in the past.

In the RCP four-way polling average, Clinton leads Trump by 6.9 points. This is her highest level of support of the general election cycle.

Business Insider's most recent Electoral College projection found that if the election were held late last week, Clinton would most likely have enough electoral votes to win the presidency.