Never gonna happen.
He needs someone to help him.
Jeff “Skunk” Baxter
Scott Walker, John Kasich, and Marco Rubio would all help the ticket geographically.
But what would be better I think is a woman. That is one argument that has not stuck with Trump, he has not disadvantaged women in his business empire or we would have seen the long parade long before now. Condoleezza Rice? Maybe a damaged brand. Palin? No real help there. Carly Fiorina? Maybe.
Then one other which may be outstanding is Jeff Sessions. He is the better Cruz than Cruz. His endorsement before Super Tuesday would really help Trump, and he might could tow the SE in the General Election.
Trump could also go non-political like Perot did with Admiral Stockdale. Not sure who would be on that list.