Let's assume that Der Donald ends up with a commitment from 35% of the delegates -- commitments mandated by the vote spread in their home state. The rest are split between Cruz, Rubio, etc. etc. etc.

The Republican Convention comes to the first vote and 35% of the delegates cast their vote for Trump, as they are required to do. That relieves them of the necessity to cast their second vote for him and puts the nomination into the hands of the party in general.

High up in the hotel towers, in a smoke-filled room, the Powers That Be decide that Kasich would be a far better candidate than any of the others.

Kasich is nominated and for political reasons he asks Ben Whatshisname -- the neurosurgeon -- to be his running mate. But Trump, now a loser, runs as an Independent, using his own money, with Palin as VP candidate (this tosses out any further affiliation with the Republicans for eaither of them, of course).

This splits the party into tiny fragments.

The Democrats don't have that kind of problem. They nominate Sanders, who asks Warren to run with him as VP. Clinton throws her committed followers behind the Sanders/Warren ticket.

Who wins?