Two of the very best reporters at The New York Times, Maggie Haberman and Jonathan Swan, have written an important book about President Trump’s “second presidency”. The book, Regime Change, makes it abundantly clear that the 47th president is and will be far more consequential than the 45th. There are any number of books that offer, or claim to offer, what you might call a Unified Theory of Trump. Regime Change does not do that.