Ginni and Clarence Thomas Have Done Enough Damage

What did Justice Clarence Thomas know, and when did he know it?

The question usually gets directed at politicians, not judges, but it’s a fair one in light of the revelation on Thursday that Justice Thomas’s wife, Ginni, was working feverishly behind the scenes — and to a far greater degree than she previously admitted — in a high-level effort to overturn the 2020 presidential election.

As The Washington Post and CBS News first reported, Ms. Thomas, a supremely well-connected right-wing agitator, was in constant communication with the White House in the weeks following...