Forget Christie and Bush. Take a good hard look at Walker.
Okay:
Scott Walker supports path to citizenship
http://www.politico.com/story/2013/02/scott-walker-supports-path-to-citizenship-87960.html
Scott Walker backs path to citizenship, increased immigration
http://www.washingtonpost.com/blogs/post-politics/wp/2013/07/03/scott-walker-backs-path-to-citizenship-increased-immigration/
Jeb knows this, so if Jeb is still a significant factor in the race a year from now, he will ask Scott to consider running as his Vice President, and Scotty will say yes.