The rivalry between President Donald J. Trump and California Gov. Gavin Newsom reached a new level after Trump called for Newsom's arrest.

Trump calls Newsom ‘grossly incompetent’

What we know:

On Monday, Trump said if he were border czar Tom Homan, he would have Newsom arrested.

"I would do it if I were Tom," Trump said, responding to a question from Fox News’ Peter Doocy on the White House lawn. "I think it's great. Gavin likes the publicity. But I do think it would be a great thing. He's done a terrible job."

"I like Gavin Newsom," Trump continued. "He's a nice guy, but he's grossly incompetent. Everybody knows. All you have to do is look at the little railroad he's building. It's about a hundred times over budget. We're putting a flagpole over there. Under budget. I always do unde

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