I dont think Trump will pick a politician for his VP
I think he has, in fact, said that was his plan. "We don't need two of me."
Also, I think he's indicated that he would be looking in a battleground state.
Rubio fits the bill, and as has been pointed out, would be a sop to the establishment.
Cruz is an absolute no-go. Trump's not going to suddenly excuse the NBC issue, and he's not going to choose someone he's tagged as "liar."
“I dont think Trump will pick a politician for his VP”
Trump has said that he would.
A couple weeks ago he said he would choose someone in politics for VP.