It’s not over yet. Mitt Romney claimed the biggest Super Tuesday win in Ohio, barely eking out a victory with 38 percent of the vote to Rick Santorum’s 37. Santorum, who won Tennessee, North Dakota, and Oklahoma, played up his narrow loss, telling supporters, “We keep coming back” and promising a hard fight in upcoming Southern states. Newt Gingrich won decisively in his home state of Georgia, while Romney took Massachusetts, Vermont, Idaho, and Alaska. Romney also won Virginia, but Santorum and Gingrich weren’t on the ballot there, and Ron Paul took 40 percent of the vote. Romney is far ahead in delegate tally, with about three times as many as his rivals, but the narrow victory in Ohio, where he vastly outspent the competition, shows his campaign is still vulnerable.