With an assist from ABC, Kamala Harris won the presidential debate in Philadelphia. The moderators vigorously, and at times misleadingly, fact-checked Trump. He was right that Harris has in previous years come out for kicking 180 million Americans out of their private health plans and for confiscating guns. (The key word in “mandatory buybacks” is the first.) They did not challenge her, letting her claim that his reference to a postelection “bloodbath” was about civil strife...