I could definitely see him being a factor if he decides to run. If Romney wins the nomination, I would imagine he would either pick Thune or Demint as a running mate in order to bring the evangelical vote towards him. I haven't heard him speak, but if he sounds intelligent & confident, he can probably win a lot of votes.
That's basically my ideas, although I think that DeMint would never be picked. 
Didn't he endorse Romney in the last election? I think he did (not positive on that one), and it would look excellent to shore up Mitt's evangelical credentials. Just my opinion!
You do realize that, just over five years ago, DeMint said that single mothers shouldn't be allowed to teach in public schools?:
https://uselectionatlas.org/FORUM/index.php?topic=10209.0That alone probably makes him too politically radioactive for Romney to consider him. Why would Romney take that kind of a gamble, when there are other choices who have not made such controversial statements?
