From a legal standpoint, it's generally best to exercise your right to remain silent. If a cop pulls you over, they will ask you why they pulled you over. In any other circumstance, this would be a stupid question, but, for the cop, it gives them the opportunity to open the door for the nervous person to start incriminating themself. So, "do you know why I pulled you over" should only ever be answered with "No sir, could you tell me?" Usually, even putting the defendant on the stand to testify in a trial is perceived as a risky move, as anything that is said will be overanalyzed by the jury. But I don't think Trump really cares about the legal implications here. If he's convicted of RICO charges, there's a minimum 5 year sentence. That's basically life at his age. He is playing the game of politics, and the news media keeps trying to commentate on this as if it were him playing the game of law. They did the same thing during the impeachment and also the other impeachment. As if Trump's perceived guilt or innocence means anything to these senators. That's not how anything works. It's like they are watching a football game and adding a commentary as though it's golf.