It's becoming clear that Romney has decided to focus on the economy at the expense of everything else, even issues that could play to his political benefit. He's avoided criticizing the administration's handling of the botched Fast and Furious operation, even as it threatens to become a serious vulnerability for the president. He's been silent in responding to Obama's immigration executive order, not wanting to offend receptive Hispanics or appear like a flip-flopper. He appears more likely to tap a safe, bland running mate like Ohio Sen. Rob Portman or former Minnesota Gov. Tim Pawlenty who won't do him any...