This article is part of The D.C. Brief, TIME’s politics newsletter. Sign up here to get stories like this sent to your inbox. As he closed out the gun lobby’s biggest annual gathering on Friday with an hour-long keynote, Donald Trump had tough words for Communists, foreign wars, critics of Christianity, and supporters of transgender rights—oh, and his former Vice President. “I hope you gave Pence a good warm approval,” Trump said, clearly knowing his potential rival for the 2024 nomination had been welcomed earlier with a smattering of boos.