Exactly, except it is Sununu, not Kasich. That explains NH.John Kasich is able to defeat President Trump in the Republican primaries and win the party's nomination. Sore loser that he is, Trump quits the GOP and runs as a third party candidate.
Needless to say, Trump wins only in West Virginia but he takes 10-25 percent in a lot of states, especially in the South, and preventing Kasich from winning states which a generic Republican should have won.