WASHINGTON — President Donald Trump’s personal lawyer, Michael Cohen, is challenging porn actress Stormy Daniel’s unsubstantiated charge that someone tied to Trump threatened her with physical harm if she went public with her story about a tryst with Trump years ago.

Daniels said in a “60 Minutes” interview broadcast Sunday that a man approached her in a Las Vegas parking lot in 2011, when she was with her daughter, and said: “That’s a beautiful little girl. It’d be a shame if something happened to her mom.” She said the man told her to “leave Trump alone. Forget the story.” Michael Avenatti, her lawyer, acknowledged Monday he has no direct evidence tying the threat to Trump or his lawyer.

But he said he was holding back certain details of the alleged affair, including the contents of a CD or DVD he tweeted a picture of last week. “It would make no sense for us to play our hand as to this issue and we’re not going to do it right now,” he said on NBC’s “Today” show Monday.

Cohen’s attorney, Brent H. Blakely, demanded that Daniels or Avenatti apologize to his client for alleging intimidation.

“In truth, Mr. Cohen had absolutely nothing whatsoever to do with any such person or incident, and does not even believe that any such person exists, or that such incident ever occurred,” he said, asserting that Daniels and Avenatti should “cease and desist from making any further false and defamatory statements about my client.”

Daniels told “60 Minutes” she had consensual sex once with the future president, providing a few salacious details but little new evidence of the encounter.