You might think that the methodical extermination of millions of Jews by a brutal regime intent on world domination would resist appropriation as an all-purpose metaphor. You might think that genocide, of all things, would be safe from conversion into sloppy simile.

You’d be wrong.

After Paul Ryan’s fact-challenged address at the Republican National Convention last year, the chairman of the Democratic Party in California actually compared him and his compatriots to the Nazi propaganda minister Joseph Goebbels. A short time later, the chairman of the Democratic Party in South Carolina likened that state’s Republican governor, Nikki Haley, to Adolf Hitler’s mistress, Eva Braun.

At that point Abraham Foxman, the national director of the Anti-Defamation League, did what he shouldn’t need to do even once, let alone the multiple times that he’s been forced to. He implored politicians and pundits to stop it already.

No matter. Allusions to Nazi Germany were back for debates over gun control and, of course, Obamacare. Ted Cruz, the Senate’s prince of tirades, compared people who claim that the new insurance program can’t be stopped to those who rolled over for Hitler and the Third Reich. This prompted a public reprimand from John McCain, who has developed something of a sideline career of swatting Cruz on the nose. They’re like a hapless master and his hopeless dachshund. The former keeps trying to housebreak the latter, while the latter just beams at every mess he makes.