As the finish line draws nearer, Hillary Clinton is facing the biggest hurdle in her campaign.
While she travels through the key swing state of Florida, her camp has set their sights on FBI director, James Comey, who's the target of their latest ad.
But Mrs Clinton is keeping a brave face.
"Everyone is knocked down in life. What matters is you get back up," she said.
Mrs Clinton is questioning Comey's motivation about reviewing new emails possibly linked to her private server.
They were discovered on the laptop of disgraced former congressman Anthony Weiner, the estranged husband of Mrs Clinton's top aide, Huma Abedin.
Democrat Vice-Presidential candidate Tim Kaine addressing the issue on ABC America said: "It's just extremely puzzling. Why would you release information that is so incomplete when you haven't even seen the material yourself?"
The Democrats claim Comey is breaking electoral law by intervening in the political process.
The party's Senate leader, Harry Reid, took it one step further, accusing Comey of sitting on damaging information about Donald Trump.
In a letter, he wrote, "Through your partisan actions, you may have broken the law."
"...It has become clear that you possess explosive information about close ties and coordination between Donald Trump, his top advisors and the Russian government."
But as Mr Trump attended church services in Nevada, the billionaire called this latest email scandal a gift from above.
"We never thought we were going to say 'thank you' to Anthony Weiner"," he said.
A third of those who've already voted for Mrs Clinton have said they might not have done so if they'd known about the latest FBI investigation.
The polls in the battleground states are tightening, with both contenders now in a dead heat in Florida.
As he campaigned in Colorado, Mr Trump upped the ante on electoral fraud.
"Who has sent their ballots in? Do you think those ballots are properly counted?"
"I know they're all saying is so legitimate."
But in Arizona, a Trump supporter has been condemned for aiming an anti-Semitic chant at the media.
The polls favouring Trump were taken before the FBI email leak, which may not be good news for Hillary Clinton in the final stretch of this marathon race to the White House.
And another milestone has been reached in this election, with more than 200 million voters now registered, for the first time in US history. A sign the aggressive registration efforts have paid off.
With agencies
Sarah Abo is in Washington DC as part of SBS' coverage of the US Presidential election.
