Pete Buttigieg and Tom Steyer drop out. Other Democrats also should do the right thing.

With the Super Tuesday primaries rapidly approaching, a broad swath of Democratic voters are less interested in the political "revolution" promised by front-runner Bernie Sanders than they are in someone who would simply restore decency to the White House and provide stable leadership without wrecking the economy.

So far, however, those non-Sanders votes have been fragmented among half a dozen candidates to the right of the self-described democratic socialist from Vermont, who wants to roughly double federal spending over the next decade and end private health insurance.

On Saturday, South...