Supply-side economist Arthur Laffer is predicting Republicans will win the White House in a landslide this year, regardless of the nominee.

“I would be surprised if the Republicans don’t take 45, 46, 47 states out of the 50,” Laffer told host John Catsimatidis on “The Cats Roundtable” on New York’s AM-970 on Sunday.

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“I mean, I think we’re going to landslide this election.”

Laffer, who served in various positions in the Nixon, Ford and Reagan administrations, said he is bullish on the entire Republican primary field.

“When I look at these candidates, I don’t see one of them who wouldn’t do a great job as president,” he said.

“I think Donald Trump is phenomenal, I think Rand Paul has done a great job, I even like Jeb Bush — I think Jeb Bush is great, he did a wonderful job in Florida,” he added. “Chris Christie – phenomenal.”

He said Democratic primary front-runner Hillary Clinton’s “day is over.”

“She would be defeated handily. I don’t think Hillary’s going to win this election no matter whom she runs against,” he said. “I mean, Hillary’s day is over.

“I think she’s a very impressive person, she’s very articulate, very well educated, got a great resume and all of that, but her policies are not good. And it’s about issues, not about people, and her day has gone,” he added.