CHARLESTON, SC (CBS/WCSC) - With 20 days until Election Day, Hillary Clinton and Donald Trump are preparing for Wednesday's final presidential debate.
The race has turned even more combative since the last debate 10 days ago.
Clinton and Trump will meet at the University of Nevada.
The latest national poll shows Clinton is ahead by nine points in a four-way race.
"I don't believe the polls anymore," Trump said. "I don't believe them."
In recent days, Trump said the election is rigged despite offering no evidence of voter fraud. Ivanka Trump says her father will do the right thing once the votes have been counted.
"But to your point, if he'll either win or he won't win, and I believe he'll accept the outcome either way," she said.
The Republican nominee is expected to raise questions about Clinton's trustworthiness. WikiLeaks has released a steady stream of hacked emails from Clinton Campaign Manager John Podesta.
In one exchange, Podesta wrote the campaign had taken on a lot of water over Clinton's email scandal.
Clinton will get the first question tonight, and experts predict fireworks will fly soon after that.
"Trump will literally throw everything in the kitchen sink at Hillary," UNLV Professor Jacob Thompson said.
Thompson is a professor and debate coach at the University of Nevada in Las Vegas. He says Clinton should be ready for the unexpected.
"It's going to get ugly, I think," Thompson said.
Since the last debate, more than a half-dozen women have accused Trump of unwanted sexual advances, allegations he denies.
Experts say the final face-off could reach new lows in presidential debate history.
That debate begins at 9 p.m.