Harris and Trump will meet each other for the first time tonight.
Vice President Kamala Harris and former President Donald Trump will meet for the first time on Tuesday for the ABC News presidential debate.
It is the only debate the two have scheduled and comes at a critical point as polls show a neck-and-neck race with just eight weeks until Election Day.
The two will face off on key issues starting at 9 p.m. ET. The debate will air on ABC and stream on ABC News Live, Disney+ and Hulu.
As he left the White House for New York, where he will watch tonight's debate, President Joe Biden said he's spoken with Harris.
Biden wouldn't divulge what advice he had for her, but said she appeared "calm, cool and collected."
"I think she’s going to do great," Biden said.
The Trump campaign posted a short clip of the former president boarding his plane, saying he's en route to Philadelphia. Harris arrived in the city Monday evening.
-ABC News' Soorin Kim
Hillary Clinton gave some advice to Vice President Kamala Harris on tonight's debate, according to The New York Times.
"She just should not be baited. She should bait him. He can be rattled," Clinton told The Times during a recent phone interview.
Clinton confirmed to NYT that she had spoken to Harris directly and discussed "a number of things" prior to the debate.
As the 2016 Democratic nominee, Clinton has experience debating the former president.
She said she believes Harris "has a lot of good ammunition" and that she's "handling him [Trump] very well."
In an interview Tuesday with ABC News' Kyra Phillips, Republican National Committee Chairman Michael Whatley said it was unfair of the Harris campaign to suggest Trump would lie on stage tonight.
He also confirmed that Trump will stray away from personal attacks, and that the former president was not nervous.
"He feels very comfortable. He's rested, he's relaxed, and he's definitely ready to go," Whatley said.
Whatley also said "this is the most united the Republican Party has been in generations."
– ABC News’ Kelsey Walsh
