WASHINGTON -- While the odds remain against him, Donald Trump still has a chance of winning the White House next week, according to statistics expert Nate Silver, who correctly predicted the outcome of every state in the 2012 presidential election.

Silver, writing on his FiveThirtyEight blog, said that if national polls show the race continuing to tighten, states now safely in Hillary Clinton's camp such as Pennsylvania and Wisconsin could be up for grabs.

Currently, Clinton has an 80 percent chance of winning in both states and a 71 percent chance of becoming the first woman to occupy the Oval Office, according to Silver.

"Trump remains an underdog, but no longer really a longshot," Silver wrote.

To win the presidency, Trump would have to hold onto every state 2012 Republican presidential nominee Mitt Romney carried, plus win Florida, Ohio and Pennsylvania, according to 270towin.

While Trump leads in Ohio, Clinton has a 52 percent chance of carrying Florida. She also has a 51 percent chance of winning North'Carolina, which went for Romney in 2012, though her chances of winning either Arizona or Georgia are shrinking.

The race started tightening even before the Federal Bureau of Investigation said Friday that it would examine emails found on a laptop used by top Clinton aide Huma Abedin to see if they were relevant to its earlier probe. The FBI said in July that Clinton mishandled classified information but did not commit a crime.

Trump has been hit with new allegations of his own, including reports that the FBI was looking at his possible ties to Russia and his use of a "legally dubious" method to avoid paying federal income taxes.

In European betting markets, Clinton's odds dropped to 1 to 3, or a 75 percent chance, from 2 to 9, an 81 percent chance, according to Dublin-based Paddy Power, which already paid off those who had wagered a Democratic victory.

Trump's odds of winning increased to 5 to 2, a 28 percent chance, from 5 to 1, a 17 percent chance.

"If money talks, and it usually does, it's telling us that Trump still has a puncher's chance and he'll be leaving us with some very expensive egg on our face if he does manage to pull it off," Paddy Power spokesman Feilim Mac An Iomaire said.

Jonathan D. Salant may be reached at jsalant@njadvancemedia.com. Follow him on Twitter @JDSalant. Find NJ.com Politics on Facebook