My guess is that he's up for election this cycle and wants to appear not to be a callus asshole.

Also, a lot of them are thinking about "what if it was me being shot at".

iirc, he's also big Russia Russia Russia liar.

it's weird to see him on right side of this Secret Service / assassination thing.

Credit where due..... he got it right.

But why? Rat jumps ship? or flash of integrity? he had enough of Kamabla migrant crisis & Dem Liars Club??