Easy. Democrats crossing over to get Trump the nomination. Hillary will be able to get them back.
You’ve got it backwards. It’s the careerist GOP politicians who will be crossing over to vote Hillary.
Not going to happen. If Hillary gets the nomination, she’ll be President. She has the precinct captains in the urban areas of Ohio, Pennsylvania and Virginia in her cash-filled pocket. The only spanner in the works is Trump because we can’t predict what will happen. He’s no McCain or Romney.