TAMPA, Fla.—Four hardy souls from rural Illinois joined tens of thousands of people undeterred by threats of Hurricane Isaac during this week's Republican National Convention. They weren't among the almost 2,400 delegates to the convention, though, nor were they from the press corps, said to number 15,000. They weren't part of the massive police force assembled here, more than 3,000 strong, all paid for with $50 million of U.S. taxpayer money. These four were about to join a much larger group: the more than 2.4 million people in the past decade whose U.S. jobs have been shipped to China. In their case, the company laying them off and sending their jobs overseas is Bain Capital, co-founded by the Republican presidential nominee, Mitt Romney.