WASHINGTON — President Trump scoffed at the idea that he has anything to fear from any of his potential 2020 rivals from the New York area — saying they’d make dream challengers.

“Fear? Fear? Do you mean fear or dream about?” he told The Post in the Oval Office Wednesday. “I dream about them. So far everyone that I’ve seen I’m dreaming about.”

One by one he ticked off the possibilities.

“I’d love to run against Little Michael,” he said, referring to former Mayor Michael Bloomberg who is exploring a bid.

“I would love to run against him. He’s been fighting me hard. He spent $100 million against me – that didn’t work. He spent a lot of money last night against Cindy Hyde-Smith. That didn’t work out so well,” Trump said.

Overall, Bloomberg’s Independence USA PAC spent $110 million in support of Democratic candidates, who won 21 of their 24 races.

Sen. Cindy Hyde-Smith, the Republican contender, easily beat back Democrat Mike Espy in a Mississippi runoff election Tuesday night after Trump made two appearances on her behalf Monday night. Bloomberg donated $2,700 in support of Espy in that race.

“I’d love to run against Michael. I don’t know if he’s going to run, but I’d love it,” Trump repeated.

When asked about Sen. Kirsten Gillibrand (D-N.Y.), Trump recalled how she used to ask him for contributions.

“She’d be up in Trump Tower not asking, a stronger word than asking, for campaign contributions,” Trump said. “I know her very well. I supported her early on.”

As the president became more conservative, he said Gillibrand became more liberal.

“She’s the only person I’ve ever seen who loved guns more than any human being on earth when she was a congresswoman from upstate New York back then. She loved guns more than any person, anywhere in the United States,” Trump said. “The day she announced she was running for the Senate. All of the sudden, ‘Gun? I’ve never heard that word before.’”

“She’s not going to make it, she’s not going to make it,” Trump added.

The president was also not concerned with Sen. Cory Booker (D-N.J.), who formerly served as the mayor of Newark.

“He ran Newark into the ground. And he decided not to live there, which was illegal. So I’m sure they’ll look into that situation,” Trump said. “He did such a bad job in Newark that he didn’t live there. No, he’s not going to be a problem.”

The president was happy to say nice things about Gov. Andrew Cuomo, who announced Tuesday he wouldn’t be a 2020 presidential contender.

“I have a good relationship with him,” Trump said. “I like him. He likes me.”