Of course, Bill Clinton should cooperate with any investigation into Jeffrey Epstein’s trafficking of underage girls. This concerns a criminal enterprise, not bad-boy behavior.

Democrats siding with the pursuit of justice should be commended. Nine of them joined Republicans on the House Oversight Committee in voting to hold Clinton in contempt of Congress for refusing to testify. Committee Chair Rep. James Comer (R-Ky.) then gave Clinton two weeks to address the matter before bringing it to the House floor for a vote.

As president, Clinton topped the charts for success, in my book. But his overseeing a federal government budget surplus is a past triumph.

There is, so far, no evidence that Clinton took part in the crimes — and no publicly verified evidence that he ever set foot on Epstein’s “Pedophile Island.” But he was a friend of Epstein and flew on his private jet.

Some commentary suggests that Bill and Hillary Clinton are Democratic royalty that many in the party want to protect. May we swat down the concept of royalty in a country founded on sweeping away hereditary rule?

Some in the Democratic leadership wrongly saw protecting Clinton from uncomfortable questions as a means to improve their prospects in the midterms. On the contrary, having him testify would show a principled interest in getting to the bottom of an appalling criminal case.

And so kudos to the Democratic reps who joined Republican committee members in voting to hold Clinton in contempt. Rep. Ayanna Pressley (D-Mass.) explained her vote: “I’m just focused on survivors … We want to hear from anyone who has information. And that should not be limited to party lines.”

The Epstein investigation isn’t about adulterous trysts. It’s about sexual abuse of girls young enough to be in junior high.