On a recent Tuesday morning, a visibly frustrated Donald Trump sat through a tense hearing in the first-ever criminal trial of a former American president. During a break, he let rip on his social media platform. New York Justice Juan Merchan, Trump declared on Truth Social, is a “highly conflicted” overseer of a “kangaroo court.” Trump supporters swiftly replied to his post with a blitz of attacks on Merchan. The comments soon turned ugly. Some called for Merchan and other judges hearing...