Christie?
IMHO, Trump will get Romney’s 206 EV’s, and add:
FL +29
OH +18
That’s 253. He needs one other double-digit state (WI, MI, NJ, PA), and he’ll pick up one or two smaller states (eg, NH, IA, NV, ME, CO) minimum.
Trump will have lots of pathways. With Giuliani, he might even get NY. If he would get NY with Giuliani as VP, I would take that deal.