Hillary ClintonHillary Diane Rodham ClintonMark Cuban says he's decided not to run for president Trump official criticizes ex-Clinton spokesman over defunding police tweet Poll: Biden leads Trump, Cunningham neck and neck with Tillis in North Carolina MORE is one state away from losing the presidential election, FiveThirtyEight's Nate Silver said Sunday. 

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While the Democratic presidential nominee has a 65.7 percent chance of winning the presidency on Tuesday, she is not "in a terribly safe position," the pollster said on ABC's "This Week." 

"The electoral map is actually less solid for Clinton than it was for Obama four years ago," Silver said. 

Silver came to notoriety by correctly predicting President Obama's victories in 2008 and 2012. 

Clinton is weaker among Midwestern voters, while Obama had leads in states like Ohio. 

In FiveThirtyEight's election forecast, Clinton has the 270 electoral votes needed to clinch the White House. 

"Clinton has about 270, so she's one state away from losing the Electoral College," he said. 

"You would rather be in her shoes than [Republican nominee] Donald TrumpDonald John TrumpFederal plan to contain Washington protests employs 7,600 personnel: report GOP Rep calls on primary opponent to condemn campaign surrogate's racist video Tennessee court rules all registered voters can obtain mail-in ballots due to COVID-19 MORE, but she's not in a terribly safe position."