Perhaps Not His Only Mistake 

And by the way, as I said yesterday, Rubio has all the information he needs to know that if his goal is to stop Trump, he should get out now, endorse Ted Cruz, and give Cruz a chance to win Florida. If he doesn’t, he should be held responsible for the failure to stop Trump. And I’d assume it means that Rubio prefers Trump to Cruz, but that’s an assumption based on a weak foundation — that Rubio is good at making decisions.

Via Althouse: “Inside Rubio’s collapse: A fateful decision that helped unravel his campaign.”