Donald Trump vows to spend big on White House race

I am willing to spend much more than that if I have to, says Trump

Donald Trump vowed to pour his own millions into the race for the White House on Wednesday, refusing to be written off in the uphill battle against frontrunner Hillary Clinton.

Polls showed the Democratic nominee, who is vying to become the first female US president, still comfortably ahead of her billionaire Republican rival with just 13 days to go before Americans pick a new president.

The 70-year-old Manhattan businessman took heart, however, from a new survey that shows him with a two point lead in early voting Florida, and a slight narrowing in the race nationally.

"We are going to have, I think, a tremendous victory," Trump said in an interview with CNN before heading to North Carolina, one of the battleground states he needs to win on November 8.

Pressed on whether he'll open his wallet to match an onslaught of Clinton ads, Trump said he will have spent  $100 million by Election Day.

"I'm willing to spend much more than that if I have to," he said.

Trump departed for Charlotte, North Carolina after carving out precious time for the grand opening of his new luxury hotel in Washington, the Trump International Hotel.

Clinton marked her 69th birthday campaigning in Florida, speaking to a capacity crowd in Lake Worth before flying to Tampa on the Gulf coast.