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FiveThirtyEight’s “now-cast” model is giving Trump a nearly 10-point edge over Clinton in response to the question, “Who would win the presidency today?”

On the eve of presidential debate,, @FiveThirtyEight poll analysis shows Trump favored to win on Election Day. #tcot pic.twitter.com/jk4BNa8uCt — The Patriarch Tree (@PatriarchTree) September 26, 2016

Silver previously gave the Republican presidential nominee a sizable advantage over his Democratic rival in late July, following the Republican National Convention.

Today’s prediction comes just hours before the crucial first presidential debate.

Clinton, the Democratic nominee, still holds the lead in FiveThirtyEight’s two other predictive models: polls-plus forecast and polls-only forecast.

In both models she leads by a narrow margin of 3.6 percentage points.

The website's electoral map graphic appears to show Clinton winning over 270 electoral votes in all three models, though in its calculation of total electoral votes won by each nominee, Trump receives 275.9 votes to Clinton's 261.9.

UPDATE 3:53 p.m.: New polls released since Monday morning have led FiveThirtyEight to revise their now-cast in Clinton's favor.