Extreme supporters of Donald Trump have met news of his federal indictment with visions of violence and retribution. At The Donald, a forum for ultra-MAGA Trump supporters, users demanded public executions and other forms of lynching to avenge the federal prosecution of Trump, for the alleged mishandling of state secrets at Mar a Lago after he was no longer president. The calls for violence appeared in comment threads, responding to posts on the front page of the forum Thursday night, after news broke of Trump’s latest legal troubles. The most extreme comments were written in response to a fanciful post...