Never say never. If the GOP is desperate enough for a winner by then, he might get nominated.
Well. I can say that I would never vote for either one of them, and you can take that to the bank.
How does he become a winner before he's even nominated? He can't win anyway. People who are looking for a proabortion, progay, gun control candidate have the real thing to choose from in Hillary. Meanwhile Republicans who are Republicans becasue of abortion, moral decay and the second amendment will simply stay home.
To win the presidency you need your party's base. Giuliani simply can't get moral conservatives.
If he gets nominated, he will disenfranchise people like me. He has too much baggage. But, put him in a job that needs the skills he displayed as mayor of NYC. Maybe, mayor of NYC! Not president.