"I gave him $1 million towards his legal fees a few weeks ago. I made a promise to give him $20 million more, that will be to the super PAC," Bigelow said in an interview.

Bigelow said he felt Trump was being unfairly targeted in the criminal cases, and that his sympathy towards Trump had motivated the donation. The Justice Department says it acts without political bias.

Trump is facing four criminal proceedings, including charges of attempting to defraud the federal government and obstructing Congress by knowingly spreading false claims of election fraud.

Bigelow said he had dinner with Trump on Monday night at his Mar-a-Lago residence in Florida. "It was supposed to be one hour. It was over two hours. And we still ran out of time," Bigelow said, declining to provide details of their conversation.