President Trump doubled down on his savage new nickname for Democrats — and revealed which member of Congress inspired it.

“I came up with a new name. I don’t know if I should,” Trump told Fox News Anchor Sean Hannity late Thursday in an interview about his historic meeting with Chinese President Xi Jinping this week.

“Dumocrats — because they’re dumb,” Trump said, explaining that his version gets rid of the ‘b.’

The president said he first came up with the nickname while discussing House Minority Leader Hakeem Jeffries (D-NY) — who he called a “very-low IQ individual.”

Trump has a new nickname for Democrats on Capitol Hill.…