Statistics expert Nate Silver claims defeated Democratic presidential candidate Hillary Clinton would "almost certainly" have made it to the Oval Office if the election had been held before FBI Director James Comey announced the reopening of the agency's investigation into her private email practices.

"Comey had a large, measurable impact on the race," wrote Silver, who ran FiveThirtyEight's election forecast, in a series of tweets Sunday morning.

According to Silver, voters who decided to cast their ballots in the final week before Election Day "broke strongly against Clinton," particularly in three of the major battleground states she ultimately lost to President-elect Trump.

Fifty-nine percent of late-deciding voters in Wisconsin wound up supporting Trump, compared to 30 percent who backed Clinton, 54 percent went for Trump in Pennsylvania and 50 percent backed him in Michigan, according to a graphic Silver posted.

There's more evidence, too: Late-deciding voters broke strongly against Clinton in swing states, enough to cost her MI/WI/PA. pic.twitter.com/8r801ahDQO — Nate Silver (@NateSilver538) December 11, 2016



"I'll put it like this: Clinton would almost certainly be President-elect if the election had been held on Oct. 27," he tweeted, referring to the day before Comey sent a letter to congressional committee heads about the agency's reopened investigation.

Along with many Democrats, Clinton herself has largely blamed Comey for her stunning defeat last month. Comey cleared Clinton a second time just days before the election.

"There are lots of reasons why an election like this is not successful," Clinton told donors on a conference call one week after the election. "Our analysis is that Comey's letter raising doubts that were groundless, baseless, proven to be, stopped our momentum."