I don’t think he is saying Walker’s wife could run him. I think he is just pointing out that Walker may be an Obama/Clinton/McCain/Romney on the issue. Walker shows every sign of being one who is against it for political reasons only.
The candidate whose wife runs him is Jeb.
I agree about Jeb, but I think your thoughts on the other part are somewhat thin. Not trying to be insulting, but if he wasn’t try to say Walker’s wife could run him, why address it the way he did? Why bring her into it?
Simply state you have been watching Walker over time it seems clear to you his stance is more of a convenience that a true core belief.
It’s my take that Santorum was clearly trying to say Walker was subject to his wife’s notions. Could be wrong, but that’s my take.