A national poll of polls puts Hillary Clinton just 2.2 points ahead of Donald Trump, days after the FBI announced it was revisiting its investigation into her use of a private email server as secretary of state.

The Democratic presidential hopeful was as many as 7.1 points ahead two weeks ago, according to the RealClearPolitics poll, but the gap has since closed considerably, theweek reports.

With no sign that the new FBI investigation will be completed any time soon, Clinton will go into Election Day with unspecified allegations hanging over her head.

But with only one week to go, Chris Cillizza at the Washington Post says polling experts are waiting for the news to "marinate with the public".

On a national level, Trump is getting "closer and closer and closer" to Clinton, he says, with both in a "statistical dead heat" of the mid-40s.

But even the gains Trump has made in some swing states have failed to put him ahead and he remains behind in most of them by a "statistically significant" number, says Cillizza.

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