Following furious demands from Democrats to release his tax returns, Mitt Romney offered the fullest explanation yet of his tax status Thursday, saying that he paid a tax rate of at least 13 percent of his income in each of the last 10 years. Thatâs a long way off from Senate Majority Leader Harry Reidâs claim that an investor at Bain Capital told him that Romney paid nothing in taxes over the last decade. âIâm sure waiting for Harry to put up who it was that told him what he says they told him,â Romney said. âI donât believe it for a minute, by the way.â