Of all the vulnerable Senate Republicans clinging to the fantasy that they can run away from Donald Trump, the clingiest has to be Sen. Rob Portman (R-OH). This is the guy who was doggedly endorsing John Kasich, 20 minutes before Kasich dropped out. That's what's making this extra super-duper delicious. A senior Trump campaign source said Wednesday that the campaign's early favorites for vice president are now New Mexico Gov.