House Speaker Nancy Pelosi, D-Calif., is often called the grown-up in the U.S. House, struggling to control the troublemaking children of the House Democratic freshman class. The joke lands well when Pelosi struggles to prevent the 29-year-old Rep. Alexandria Ocasio-Cortez, D-N.Y., from setting the national party’s agenda single-handedly.

But the joke becomes a little less funny when Democrats infantilize one of their own — a mother in her late 30s who has been a fellow at one of the nation’s top-ranked public policy schools — to excuse anti-Semitism. We refer, of course, to Rep. Ilhan Omar, D-Minn.