Presidential primaries get very dirty, and that’s to be expected. But here in April 2023, the GOP one has already descended into a disgusting spiral of lies and insanity — because of the increasingly disordered and amateurish Donald Trump campaign. Trump has a clear lane in the primary. He has a record of accomplishment as president; he led the country to prosperity that has since sharply declined; he exposes the politicization and corruption of our government agencies when he’s personally targeted by leftist activist district attorneys like Alvin Bragg and when he is the subject of a baseless search for...