 Former New Jersey Governor Chris Christie, who helped Trump pick Mike Pence in 2016, told ABC News Trump is sticking with his base rather than trying to win over undecided and independent voters. It's a base choice. You know, Donald Trump has decided that he is going to not try to expand the party by drawing in more independents than others. He's decided that what he wants to do is to try to further solidify his base. It's a reflection of how confident...