Far worse than a "bad choice." It's the single, most important thing he's done. It convinced me that he's nothing but a lying little backstabbing creep. At that point all of his faux "conservative" rhetoric meant, and means, nothing to me. He's no longer a legitimate candidate, period. If Chris Christie were still running and the race came down to him and the Rube, I'd vote for Christie.
I agree. My wife has been on the fence about Rubio because she worries Trump is too uncouth. I tell her all the time “his only accomplishment is lying about his core values in order to get elected. I can never trust him, ever.” I think she’s come around, or at least given up hope that Rubio can “save” us from Trump.