I think it’s a good practice to pick the best candidate for VP. Rubio is a gang of eight schmuck and a sellout, Susana Martinez implemented Obamacare in her state, Ben Carson doesn’t have the experience to run the U.S. and Carly Fiorina has a mediocre business record. My point is, that we will always be called racists and sexisits by the left, minorties that run for office on the right will always be called sell outs and Uncle Toms, with this fact in mind why would we want to elevate people based on their ethnic background or sex when there are far better qualified candidates? Playing the affirmative action game allows us to pick the weakest candidate to run and is a disadvantage.
Reagan’s 1980 pick of Bush - an example of a conservative candidate picking a GOPe to unite the party and reach more voters in the election.
Cruz picking Rubio would do the same, along with the appeal to hispanics I mentioned.
The field of potential VP candidates is much larger than those running for President. I believe it should be someone with the same philosophy as the Presidential candidate as the number one criteria.