Santorum seems like he lost his way. He should not have run this time. His moment passed.
Sellout. Pure & simple.
Just the fact that he lost reelection by 19% should have dictated he was retired from politics.
I am sure Santorum collected a few dollars in campaign cash, over which he has considerable control. And, he keeps his name in the news, may be write a book, or offered a position in the Rubio admin.