Democrats want to make the midterms about abortion, not inflation, and on cue Tuesday Sen. Lindsey Graham introduced legislation to enact a nationwide ban at 15 weeks of pregnancy. This is constitutionally dubious, and although Mr. Graham is right that Democratic abortion absolutists too often get a pass, he is taking a big political gamble.

As a policy, 15 weeks of abortion on demand is about on par with the laws in Western Europe. That would continue to permit most of the abortions done in the U.S. In 2019, 92.7% were performed at 13 weeks or before, according to a study by the Centers for Disease Control and Prevention. That’s why Mr. Graham styles his bill a ban on later abortions, which the legislative text describes as procedures that often “involve the use of surgical instruments to crush and tear an unborn child apart.”