Mitt Romney Giving Up?

John Fund at the WSJ's Political Diary writes:

Mr. Romney has only a few days left to change the dynamic of the race before 21 states vote next Tuesday. As of yesterday afternoon, his campaign had purchased no television ad time in any of the Super Tuesday states. "If Thursday goes by without an ad buy, it will be a sign the Romney campaign is only going through the motions," says one TV advertising expert with ties to no candidate. "After all, we know he can write a check if he has to."

UPDATE: Hugh Hewitt writes me that: "John: He's already up in CA with a 7 figure buy. HH" So it looks as if John Fund might be wrong this time.