Not a good idea. I’m not a big Christie fan, I can see where he might have value in the administration, but VP? No. Too much brash northeastern. He’ll remind all the southerners why they dislike them, lol.
Trump has proven himself in the south. CC would not be a minus there. In the general we need NY,NJ and Pa. CC only drawback is he is a Cowboy fan. Though could help in Texas.