Former Democratic presidential candidate Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE jokingly feigned ignorance that Saturday marked a year anniversary of former FBI Director James Comey's letter announcing that he was reopening the investigation into her private email server just days before the election.

"Oh is that today?" Clinton tweeted in response to statistician Nate Silver's tweet that Clinton would have won the 2016 election if not for Comey's letter.

Oh is that today? https://t.co/AYy7CtYRWj — Hillary Clinton (@HillaryClinton) October 28, 2017

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In his attached article, Silver wrote that the revelation of the deleted emails "upended the news cycle and soon halved Clinton’s lead in the polls, imperiling her position in the Electoral College."

Comey in October of last year sent a letter to lawmakers about the discovery of new emails the FBI said were potentially relevant to the investigation into Clinton's use of a private email server while serving as secretary of State. While Comey later recommended that no criminal charges be pursued against the Democratic candidate, widespread media coverage and a barrage of attacks by now-president Trump on the issue had already brought the issue into the public eye.

Silver similarly said last December that, "Comey had a large, measurable impact on the race. Harder to say with Russia/Wikileaks because it was drip-drip-drip."

In her tell-all book "What Happened," Clinton dedicated an entire chapter to the fiasco, titled "Those Damn Emails," a reference to a comment by her opponent Sen. Bernie Sanders Bernie SandersJacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee Trump campaign plays up Biden's skills ahead of Cleveland debate: 'He's actually quite good' Young voters backing Biden by 2:1 margin: poll MORE (I-Vt.) during a primary debate on the issue.

Clinton has said multiple times she would have won if it weren't for Comey's letter.

"I would have won but for Jim Comey's letter on Oct. 28," Clinton told CNN earlier this month. "I think every day that goes by, the evidence of that becomes clearer."