He is not mentioned as often as others, but Santorum could make for a darkhorse Trump VP pick–Pennsylvania roots when the Keystone State is shaping up to be a must-win for Trump; impeccable conservative and especially social-conservative credentials; a long-standing interest in the GOP cultivating the working class; an able communicator. He certainly makes more sense than a few of the sitting senators who are usually mentioned, especially Bob Corker and John Thune.