While most speakers at the Faith and Freedom Coalition played up conservative themes, Donald Trump delivered a crowd-pleasing reprise of a few old favorite themes. But also in his sights: House Majority Leader Eric Cantor, who has called for spending offsets for disaster-relief funds following a tornado in Joplin, a southwest Missouri town, that killed at least 138 people. “Rep. Cantor, who I like, said we don’t want to give money to the tornado victims. And yet in Afghanistan, we’re spending $10 billion a month,” Trump said. “But we don’t want to help the people that got devastated by tornadoes,...