President Donald Trump is wasting little time mocking the White House bid of Sen. Elizabeth Warren (D-MA).

In an excerpt of an interview slated to air in full Monday evening on Fox News, the president chided the Massachusetts Senator over her efforts to prove Native American ancestry.

“She did very badly in proving that she was of Indian heritage,” Trump told Fox News host Pete Hegseth. “That didn’t work out too well. I think you have more than she does and maybe I do, too. And I have nothing. So, you know, we’ll see how she does. I wish her well. I hope she does well. I’d love to run against her.”

Hegseth went on to ask Trump whether Warren truly believes she can take the White House in 2020.

“Well, that I don’t know. You’d have to ask her psychiatrist,” Trump said, slyly.

Watch above, via Fox News.