Trump's odds of winning drop 12 percent overnight, poll tracking firm reports

Republican presidential candidate Donald Trump speaks during a campaign event at Lackawanna College in Scranton, Pa., July 27, 2016. Trump said earlier Wednesday that he hoped Russia had hacked Hillary Clinton’s email, essentially sanctioning a foreign power’s cyberspying of a secretary of state’s correspondence. “Russia, if you’re listening, I hope you’re able to find the 30,000 emails that are missing,” Trump said. “I think you will probably be rewarded mightily by our press.” (Todd Heisler/The New York Times) less Republican presidential candidate Donald Trump speaks during a campaign event at Lackawanna College in Scranton, Pa., July 27, 2016. Trump said earlier Wednesday that he hoped Russia had hacked Hillary ... more Photo: TODD HEISLER, NYT Photo: TODD HEISLER, NYT Image 1 of / 20 Caption Close Trump's odds of winning drop 12 percent overnight, poll tracking firm reports 1 / 20 Back to Gallery

Republican nominee Donald Trump has been closing the gap on Democratic candidate Hillary Clinton in recent weeks, but that changed in a big way Monday, according to the popular poll monitoring blog FiveThirtyEight.com.

As of Saturday, the blog - which synthesizes polling from around the country to predict elections - had Donald Trump as a slight favorite in the current modeling, at 50.1% to 49.9% chance of winning. The number does not represent the likely popular vote, but rather the likelihood of victory in the electoral college based on state-by-state polling. On Sunday Clinton edged back ahead as a 51% favorite, but by Monday Clinton was seen as having 63.3% to 36.7% advantage.

According to the blog, new numbers suggests Clinton is now narrowly favored in Florida, Iowa and Ohio, key swing states where she had trailed in recent days.

It's common for candidates to see a "convention bump" in the days immediately following the formal nomination process, but according to FiveThirtyEight founder Nate Silver, Clinton appears to be getting a much larger uptick than her opponent this cycle.

"Clinton will potentially exit the conventions in a stronger position than she entered them, perhaps also making up for some of the ground she lost to Trump earlier in July," Silver wrote Monday.

Findings released by Gallup Monday suggest that Trump actually may have lost support during the GOP convention, a phenomenon not seen previously by that polling group.

The GOP nominee has been put on the defensive in recent days following a verbal spat with the parents of a slain Army veteran which has rallied opponents on the right and the left. The tussle came on the heels of some controversial comments about national security and criticism of his convention, where his chief primary rival failed to endorse him.

At a campaign stop in Ohio on Monday, Trump tried to change the subject by raising concerns that November's general election will not be legitimate.

"I'm afraid the election is going to be rigged, I have to be honest," the Republican nominee told a town hall crowd in Columbus, according to the Associated Press. He told the crowd that he hears "more and more" that the election may not be fair.

According to FiveThirtyEight, Trump currently trails Clinton by roughly 60 electoral votes in current modeling.