FBI investigation into Clinton involves thousands of new e-mails

Hillary Clinton is grappling with a fresh email scandal

Mrs Clinton enters the final full week of the presidential race on the defensive once again as she prepares to campaign across Ohio.

The former US secretary of state vowed over the weekend that she would not be “knocked off course” in the election’s final days by the discovery of new e-mails in an unrelated sexting investigation.

It is unclear what is contained in the e-mails or if any of them were sent or received by Mrs Clinton herself.

“I’m not stopping now, we’re just getting warmed up,” the Democratic hopeful declared during a packed rally with gay and lesbian supporters in the battleground state of Florida on Sunday.

“We’re not going to be distracted, no matter what our opponents throw at us.”

Republican candidate Mr Trump, who had been trailing Mrs Clinton nationally and across key battleground states, campaigned with new vigour over the weekend as he seized on the news in an effort to boost his struggling candidacy.

Mr Trump is heading to Michigan for a pair of rallies in a state which last voted for the Republican presidential nominee in 1988 – George HW Bush.

“The polls have come out and they have been amazing, even before the big blow-up on Friday,” Mr Trump told a crowd of thousands packed into an airport in Albuquerque, New Mexico – another traditionally Democratic state which Mr Trump believes he can win.

“Traditionally, you understand, Republicans aren’t quite there, right?” Trump told the crowd. “But this is a Republican who is there, and we’re going to win this thing.”

Mrs Clinton’s advisers and fellow Democrats, furious over the vague letter sent by FBI Director James Comey to US Congress on Friday, have been pressuring him to release more details about the e-mails, including whether Mr Comey had even reviewed them himself.

The e-mails were found on a computer which appears to belong to disgraced former New York representative Anthony Weiner, the estranged husband of Huma Abedin, one of Mrs Clinton’s closest advisers.

Former US attorney general Eric Holder, who has been featured in an ad for the Clinton campaign, described Mr Comey’s actions as “deeply troubling” and a violation of “long-standing Justice Department policies and tradition”.

A law enforcement official confirmed on Sunday that investigators had obtained a search warrant to begin the review of Ms Abedin’s e-mails on Mr Weiner’s computer.

Tim Kaine, Mrs Clinton’s running mate, said Mr Comey owed it to the public to be more forthcoming about the e-mails under review by the FBI with the days ticking down to the November 8 election.

Calling Mr Comey’s announcement “extremely puzzling”, Mr Kaine said that if Mr Comey “hasn’t seen the e-mails, I mean, they need to make that completely plain”.

Mr Comey’s actions have energised Mr Trump after polls had shown him sliding, and unnerved Democrats already worried about the presidency and congressional races lower down on the ballot.

In a letter to US Congress on Friday, Mr Comey said the FBI had recently come upon new e-mails while pursuing an unrelated case and was reviewing whether they were classified.

Federal authorities in New York and North Carolina are investigating online communications between Mr Weiner and a 15-year-old girl.

Mr Trump has praised Mr Comey for his decision, declaring that justice will be served.