DES MOINES—Herman Cain has captured lightning in a bottle. That's the political cliché for the blast of popularity he's experiencing. But in Iowa, a state that has traditionally rewarded well-organized campaigns, the question is whether Cain is all lightning and no bottle. His supporters and political consultants are trying to get him to spend time and energy in the state, but he has a different plan. “He really doesn't have much of an organization,” says Jeffrey Jorgensen, the chairman of the Pottawattamie County Republican Party who supports Cain and calls him the “Anti-Obama... If Cain does well in Iowa, it...