“Trump’s opening himself up to the Hitler comparison,” Godwin said in an interview. And in his view, Trump is actively seeking to evoke the parallel. Trump made almost identical comments in an interview with the far-right website The National Pulse in November, around the same time Trump also called his political opponents “vermin” — all rhetoric that Hitler used to disparage Jews. “You could say the ‘vermin’ remark or the ‘poisoning the blood’ remark, maybe one of them would be a coincidence,” Godwin said. “But both of them pretty much make it clear that there’s something thematic going on, and...