He wants to be made into a martyr so bad it hurts. He knows it will give him a massive publicity boost so that he can use for a 2028 presidential run. Trump just needs to sit on his hands and let Newsom do nothing and twist in the wind while LA descends into chaos. After a week Trump can publicly issue an ultimatum to Newsom to either clean it up himself or that he'll intervene. Either way Newsom loses either because he does nothing and Trump fixes the problem or because he waited so long to do something when he could have acted sooner.
Not that it really matters. Every other Democrat hopeful is going to shit all over Newsom during the primary. He's practically the poster boy for the party's failures over the last decade. The best chance he has is the field being too split with no strong candidate and him being enough of a party insider that the machine will force everyone into line behind him, but he'll still lose nationally. California has become too much of a mess under his leadership for independent voters to trust him.