The victory of the Taliban in Afghanistan, along with the sometimes-chaotic withdrawal of American forces from that country, has produced a gusher of conservative commentary comparing President Joe Biden to his 1970s Democratic predecessor, Jimmy Carter. "This is Joe Biden's Jimmy Carter Moment" the New York Post declared. "He is like Jimmy Carter on acid," Meghan McCain, the former TV host, announced on Twitter. The conservative Washington Examiner had two different columnists connect the legacies of Biden and Carter in recent weeks, but that was restrained compared to the Wall Street Journal, where opinion pieces identifying Biden-Carter similarities have become...