President Donald Trump on Monday renewed his calls for Joe and Hunter Biden to be investigated — insisting, “Joe Biden and his son are corrupt” and only protected because they are Democrats.

“If a Republican ever did what Joe Biden did … they’d be getting the electric chair right now,” the president declared before calling journalists “crooked as hell” after a bi-lateral meeting with Polish President Andrzej Duda.

And he vehemently denied that he had told Ukraine President Volodymyr Zelensky that he would withhold US aid unless Ukraine launched an investigation into Hunter Biden’s business dealings with a gas company in Ukraine.

“Joe Biden is the one that did a very, very bad thing when he said that. I think it was $1.2 billion he wasn’t going to give unless they get rid of a prosecutor who is investigating his son and the company that his son works for,” he said before instructing reporters on what they should say to Biden.

“How much money did his son make from Ukraine? And then ask another question: How much money did his son make from China? He knows nothing about energy. So Joe Biden was very dishonest.”

The president also wavered on whether he would release a transcript of his July call to Zelensky, in which he urged him to start the probe into the family of his political rival eight times.

The former veep in 2016 reportedly threatened to withhold $1 billion in loan guarantees unless Ukraine removed a prosecutor who was probing a gas company that had named Hunter Biden to its board.

The prosecutor was later voted out of office amid a corruption probe, and a Ukrainian official earlier this year said there was no evidence of wrongdoing by Biden or his son.

The commander-in-chief then went on the attack against a favorite target — the media.

“You’re a faker, you’re a fake news group of people, you don’t want to report that. I didn’t do it,” he said, referring to the alleged threat to withhold US aid.

The president then wavered on whether he would release a transcript of his call with the Ukrainian president.

“I hope you’re going to be able to see a call. Because I didn’t do it. Everybody is looking for that call. Keep going to where you’re going because when you see the call you’re going to be very surprised,” he said.

“I could do it easily. But I’d rather not do it. I may do it. We had a nice call,” he said, adding that he was concerned about the precedent it would set.