There was one clear winner from Tuesday's Republican presidential debate, based on the simple metrics of name recognition: businessman Herman Cain's "9-9-9 Plan." Virtually all the candidates at the debate table had something to say about Cain's plan to replace the tax code with three, flat nine-percent federal taxes on consumption, business and income. Cain, once delegated to the remote wings of the debate stage, has enjoyed a surge in the polls ever since he won the straw poll in Orlando, Fla., last month, and at the first debate since he joined former Massachusetts Gov. Mitt Romney and Texas Gov....