As more state courts across the United States render difficult decisions about same-sex marriage, the political firestorm that engulfed the Iowa Supreme Court three years ago over its marriage ruling is receding in public memory.

The Iowa episode has currency today, however, especially given soaring special-interest spending in judicial elections that threatens to turn judges into politicians-in-robes. My experience at the center of the Iowa storm, meanwhile, has only strengthened my own belief in the importance of keeping politics out of the courtroom.