During an interview last June, then-candidate Donald Trump was asked what he thought about foreign students attending American universities.
"What I want to do and what I will do is you graduate from a college, I think you should get automatically, as part of your diploma, a green card to be able to stay in this country," he said.
It was an idea he'd borrowed from Hillary Clinton during the 2016 campaign, saying foreign students who want to stay after graduation "should not be thrown out of our country."
As you might have guessed by now, Trump didn't follow through on that pledge. But he didn't just renege on his promise; he's doing its exact opposite. The Trump administration is moving quickly to try to deport foreign students studying here and halting the interviews necessary for foreign students who want to study here in the future.
Setting aside the broken promise for a moment, this episode includes a valuable lesson for Democrats trying to figure out how to make a comeback.
Read Paul Waldman's full column here.