Justice Brett Kavanaugh is nearing a year on the Supreme Court, yet Democrats haven’t stopped trying to undo his confirmation. On Tuesday two Members of the House Judiciary Committee, Jerry Nadler and Hank Johnson, asked the National Archives to produce more files, some dating back 18 years, from Justice Kavanaugh’s time in the White House.

Their letter demands more documents than the thousands supplied last year, his office files from his George W. Bush years, and “emails sent to or received by Justice Kavanaugh, including emails on which he was a carbon copy or blind carbon copy recipient . . . including any documents attached.”

Messrs. Nadler and Johnson huff and puff about their committee’s jurisdiction, which covers “the laws governing judicial ethics,” as well as “judicial disqualification” and “misconduct.” They say their committee is “considering legislative proposals to create a code of conduct for Supreme Court Justices.”

The Captain Ahabs don’t even bother trying to explain why this requires them to riffle through Justice Kavanaugh’s inbox from 2003—including emails he never replied to, possibly never read, but merely received via carbon copy. His job as staff secretary was to manage the White House paper flow. How does this relate to judicial ethics?

The left failed to defeat Justice Kavanaugh last year using uncorroborated smears about his high school years, but it can’t let go. In an April letter, progressive groups urged Mr. Nadler to investigate Justice Kavanaugh. Suggested lines of inquiry: “whether there are cases on which his impartiality might reasonably be questioned and from which he must be recused; whether he lied about his financial debt and how it was repaid; and whether he is ultimately fit to be a justice on the Supreme Court.” Classy.