Sanford was widely regarded as a Republican presidential contender. Many of you may have forgotten this, but for a while in 2008 he was a serious candidate to be John McCain’s running mate. (We now stop briefly to contemplate the possibility that there were even worse options than Sarah Palin.)

Now, he’s become the second GOP hopeful in a week to do a swan dive off the adultery cliff. Perhaps the party has been too strict about the no-girlfriends-while-running-for-president rule. If they don’t drop it, pretty soon the youngest contender will be 75.

Over the past few years, he has tried to woo the party’s base with antics like bringing two piglets into the Capitol to protest political pork and refusing to accept $700 million in federal stimulus money aimed at preventing massive layoffs of public school teachers.