COLUMBIA, S.C. —When former vice president Mike Pence reemerged for his first post-White House appearance at a convention center chicken dinner here Thursday night, he did not mention how then-President Donald Trump's supporters marauded through the Capitol on Jan. 6, threatening to hang him. Or that the president attacked him on Twitter for lacking "courage" as the Secret Service rushed him to safety that day. Or the criticism Trump has leveled toward his former No. 2 in recent weeks. In fact, as Pence met privately with about 400 pastors in the cavernous First Baptist Church downtown and traveled across South...