I STILL DON'T GET THIS

A few years ago, the wingnuts were claiming that arugula was a food only eaten by liberals, most notably Barack Obama, and I've never understood why.   Before that, the only popular mention of arugula I know was in the Steve Martin 1990 movie, My Blue Heaven, in this exchange:

Vincent 'Vinnie' Antonelli: Arugula. I haven't had arugula in six weeks.
Supermarket Manager: What's that?
Vincent 'Vinnie' Antonelli: It's a vegetable.

Martin plays a mobster who's in the Witness Protection Program.