The answer is tricky, according to legal experts. Generally, politicians cannot spend campaign money on legal expenses unless they are tied to a campaign, but many of the investigations involving Trump relate to his conduct as president and as a political candidate.
However, leadership PACs such as Save America also are not allowed to directly support their own candidate’s campaign. Richard Briffault, a professor at Columbia Law School and an expert on campaign finance issues who has supported Democratic candidates, said that because Trump is fighting criminal charges during a presidential campaign, it is possible that covering legal fees could be considered a benefit to his campaign.
He’s never going to use any of that money to help other GOP candidates, so it should be considered a loss by them. The upside is that he’ll just beg his cultists to donate more to his campaign and his defense fund, and that will rob GOP candidates of funds they need.