If the election were today, Donald Trump would win

If Election Day got bumped up to Sept. 26, FiveThirtyEight predicts Donald Trump would claim a huge victory. In Monday's now-cast election predictor, released hours ahead of the first presidential debate between Trump and Hillary Clinton, the Republican presidential nominee's chances of winning were nearly 10 points higher than Clinton's, 54.9 percent to 45.1 percent.

Of course, a lot can change over the course of 43 days. But the trends over the last couple months in this particular FiveThirtyEight forecast have shown Trump steadily gaining ground and Clinton steadily losing it. After Trump briefly pulled ahead in late July, Clinton's lead peaked on Aug. 8, when she had a 96.4 percent chance of winning and Trump had just a 3.6 percent chance. Since then, it's been a slow but steady downhill slide for Clinton.

Moreover, while Clinton has consistently led since June in FiveThirtyEight's polls-plus predictor, which takes polls, historical data, and the economy into the equation, she now holds her slimmest lead yet in that measure, too: In the polls-plus forecast, Clinton's chances of winning on Nov. 8 are 51.9 percent, while Trump's are 48.1 percent.

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