The GOP presidential primary is beginning to take shape: Herman Cain is in, Mitch Daniels is out. The Indiana governor sent an email to supporters saying he has decided not to run for president in 2012, citing the “interests and wishes” of his family. Although he didn’t give specifics, Daniels' wife Cheri was widely known to have misgivings about the public spotlight a presidential campaign would shed on their relationship. She left Daniels and their four daughters in 1993, married a former sweetheart in California, then returned and remarried Daniels. Daniels had strong fundraising ties from his time in the Bush administration, and he was a favorite of the Republican establishment, which now may have to choose between Mitt Romney, Newt Gingrich, Rick Santorum, Herman Cain and most likely Tim Pawlenty, who is expected to announce his Monday his intention to run .