A common refrain from Democrats during Donald Trump’s years in the presidency was that he was undermining public trust and confidence in our courts with his talk of judges being biased and having political motives when they ruled against him.

Trump’s comments were a bunch of hooey – and it certainly was a bunch of hooey last month, too, when a prominent Iowa Democrat, U.S. Senate candidate Abby Finkenauer, sang from the Trump song sheet about judicial bias.

Finkenauer was embarrassed and angered by a decision from District Judge Scott Beattie that she failed to collect enough signatur...