Nikki Haley
Paul Ryan
Ted Cruz
Justin AmashAfter New Hampshire, it comes down to these four. These four are all still in on Super Tuesday, when all did remotely well. Amash, in last place, received pressure to drop out, and did so. Cruz wins in Illinois and Missouri force Ryan out on March 17.
On June 9, Cruz and Haley are both still in. Cruz has 1065 delegates to Haley's 718, and a decent performance will win him the nomination. Wins in MT, NM, and SD coupled with a good showing in California push him over 1218. Haley respectfully drops out, and is given the VP nod.
Other (failed) candidates:
Tom CottonRand PaulJon Huntsman Jr.Mike LeeBen Sasse