Donald Trump reflected on the “nasty” race between Hillary Clinton and Bernie Sanders in his appearance on “Jimmy Kimmel Live” on Wednesday, but two music guests backed out of the show because they didn’t want to appear on the same episode with the presumptive GOP nominee.

Singer The Weeknd and rapper Belly backed out because of their disagreements with Trump’s views, according to the Associated Press.

“I feel like the way I was raised was to be able to see through all the titles in this world, from religion to race,” Belly said in a statement to the AP. “I just didn’t want to feel like I was part of a celebration for somebody who has beliefs that a majority of us don’t agree with.”

A spokeswoman for the show had no comment. The other guest on the show was Gregory Porter.

In his appearance, Trump said he would debate Sanders if he would “pay a sum to charity.” Sanders tweeted late Wednesday, “Game on.”

Trump said that he has used an alias “over the years,” although he denied that the voice on a tape that was the subject of a recent Washington Post story sounded like him. “I actually used the name Barron,” Trump said, adding that it was a tactic used in the real estate business to avoid paying more money for property.

Trump also said that he “had no idea it was going to be so nasty” between Clinton and Sanders.

“And you hate that. You don’t like that,” Kimmel replied, sarcastically.

“I hate to see it,” Trump said, to laughs.

Trump also said that he is the one who comes up with the nicknames he’s given to rivals, like “Crooked Hillary” and “Crazy Bernie.”

Kimmel also suggested that Trump pick his vice presidential nominee like “Celebrity Apprentice.” “Good idea,” Trump said.

“I would be your best vice president,” Kimmel said, a reference to his mock campaign started earlier this month.

In a comedy bit, Kimmel read from a sequel to a mock children’s book “Winners Still Aren’t Losers.”

Kimmel also asked Trump about where he was headed to after the show — a fundraiser to raise money for a joint committee for his campaign and the Republican party.

Kimmel asked him why donors would give to a billionaire. “Do they go like, ‘Why are you asking us for money? Is it like Papa John taking up a collection for a pizza?”

“Sort of a crazy thing,” Trump replied, noting that he put in about $55 million into his campaign during the primaries.

“So now, you know, we’re going to raise about a billion dollars, for the Senate, for Congress, for everything,” he said.