On Sunday, he alleged in a video on X that his ex-wife has “significant mental health challenges”.

“If I had assaulted her, would she have offered to cook me dinner six days later?” Miller said.

Moreno also alleged that Miller had used illegal drugs, something the congressman acknowledged in his interview with CNN.

The last time he used illicit substances was “several years ago”, he said, adding that he had also used testosterone replacement therapy, which is legal when prescribed by a licensed doctor.

A spokesman for Moreno, Stefan Mychajliw, wrote on X on Sunday: “There is a documented trove of evidence that Miller has a history of violent and dangerous behaviour and no amount of victim shaming will change that.”

His ex-father-in-law, Senator Bernie Moreno, wrote on X on Sunday that his former son-in-law should not serve in Congress.

“I believe Max Miller needs to seek professional help to end the clear pattern of abuse he has left in his wake,” posted Senator Moreno.

Miller is seeking a third term representing Ohio’s seventh district in November’s midterm elections.

But internal Republican polling reportedly shows him trailing Democratic opponent Brian Poindexter by five percentage points.

Many senior Republicans have so far emphasised that these are just allegations against Miller.

The congressman acknowldged to CNN that Trump had told him over the phone on Monday: “I don’t know if you’re going to be able to pull this one out.”

But he said he had told the president he would win the election, just as he said Trump had done when embattled by various accusations.