Herman Cain’s 9-9-9 plan was the talk of the debate held Oct. 11, 2011, in Hanover, N.H., with Cain’s Republican opponents for the presidential nomination assailing the plan as unworkable. At one point, moderator Charlie Rose warned other candidates that mentioning the plan meant more rebuttal time for Cain. "If you keep mentioning 9-9-9 and Herman Cain, I'm going to have to go back to him every other question," Rose said. Basically, Cain’s plan would replace the existing laws on income taxes, payroll taxes and corporate taxes with flat tax rates of 9 percent -- a 9 percent income tax,...