As VP Santorum would be in an excellent position to run for President in four or eight years. Newt is near retirement age and may chose to step down after four. It certainly would be a very stressful four years.
Think if that is a possibility they should announce the partnership now and not wait for convention.
Other thought: It would merge the Southern vote with NE.
OTOH if Santorium were AG he could serve his country by cleaning up that department. He has the law background.
I seriously see nothing but positives if Newt and Santorum join forces. I hadn’t thought about how it would effect the South and NE. What a plus!