From now on, I am speculating, that speakers at a Trump rally will be vetted more closely.
Not that it would do any good with this nutjob. He had a mission.
I don't think he would have let on to what he was there to do no matter how much vetting.
He would have just shouted 'I LOVE TRUMP' until he got to the podium and pushed his suicide vest bomb to blow the whole thing up.