Only outcome I could see is they force Trump to pair up with someone establishment.
Doesn't matter: they will still get trounced by Hillary or Sanders in the General, and GOP will lose the Senate.
USSC will be liberal for the next 20 years.
Forcing would be a bad thing. McCain was, I think, forced to take Palin, and the negative chemistry came out.
If Trump selected a moderate as VP that would be a very smart move, assuming he got the nomination. I really doubt he'll do that.
Unfortunately, I still think a ticket headed by Trump loses, and unfortunately that would make the USSC liberal for more likely 30 to 40 years.