Penn’s op-ed made a flimsy case that concern for Palestinian life is “antisemitic.” But in hailing Shapiro as a moderate, Penn revealed it was his politics, not his identity, that gave the left pause. Shapiro is “unpopular with many progressives over energy policy, school choice and other issues,” Penn noted. This is a good thing, in Penn’s view; picking Shapiro as a running mate “would send a signal that Ms. Harris is not captive to the left and that she puts experience ahead of ideology.”