Donald Trump’s former campaign manager said the president will have a “real problem” – including facing an impeachment effort – if Democrats take control of Congress during the 2018 midterm elections.

“If you look at the numbers, I think we’ve got 32 or 33 Republican members of Congress who have already announced they are not seeking reelection,” Corey Lewandowski told John Catsimatidis on AM station 970 on Sunday. “The problem with that is the Democrats only have to take back 24 seats in the House in order to take over. And if that happens, we’ve got a real problem.”

He said the Democrats are “exceptionally motivated” to run campaigns against Trump, and if successful they will dismantle the president’s agenda and then the president.

“Their goal is to first and foremost stop the president’s agenda. And, I think, their secondary goal is to file articles of impeachment against this president, which are completely unfounded,” said Lewandowski, who left the campaign in June 2016.

Questions about Trump’s mental fitness for the office have been raised since the blockbuster tell-all, “Fire and Fury: Inside the Trump White House,” came out earlier this month.

Author Michael Wolff paints a portrait of dysfunction and incompetence at the White House, writing that Trump is “an idiot surrounded by clowns.”

The White House blasted the controversial book as “full of lies” and Trump went on Twitter to boast about being a “very stable genius.”

Lewandowski said “people shouldn’t waste their money” on the book.

“He made it up to sell books. To say that Melania Trump was crying on election night was a complete fallacy. Michael Wolff wasn’t there. He gets simple facts wrong … This Wolff thing is a complete tabloid ,” he said.