Dallas Mavericks owner Mark Cuban has pitched a $10 million deal to Republican presidential nominee Donald Trump.

In return for a four-hour interview, Cuban said he would cut a check to Trump's charity of choice. Cuban has publicly endorsed Democratic presidential nominee Hillary Clinton and has been a vocal critic of Trump.

@mcuban: .1) @realDonaldTrump $10mm to the charity of YOUR choice if you let ME interview you for 4 hrs on YOUR policies and their substance.

Ground rules of the interview are that Trump would have to focus on "the details and facts" of his policies, Cuban tweeted.

@mcuban: 2) @realDonaldTrump groundrules are that you cant mention the Clintons or discuss anything other than the details and facts of yr plans and

The "Shark Tank" star promised that the interview would be conducted by Cuban along with a broadcast crew.

@mcuban: 3) @realDonaldTrump and no one else is in the room to help. Just me, you and a broadcast crew. Deal?

Cuban gave Trump an "option" to keep the check for himself instead of a charity, referencing a Washington Post report that revealed the GOP nominee has not donated to his own foundation since 2008.

@mcuban: 4)@realDonaldTrump I'll add an option.If you need it, I'll write you the check and you can keep the money rather than give it to charity

Cuban ended his tweet storm by asking Trump what he had to lose by agreeing to the interview.

@mcuban: 5) @realDonaldTrump In the inmortal words of YOU. "What do you have to lose ?"

Trump's campaign did not immediately respond to CNBC's requests for comment.

Disclosure: CNBC owns the exclusive off-network cable rights to "Shark Tank," which features Mark Cuban as a judge.

