By winning Ohio only by a wafer thin margin on Super Tuesday, March 6th, Mr Romney has guaranteed that the race will go on a while yet. But he still looks set to win it Subscribe NOW to The Economist: econ.st/1Fsu2Vj Get more The Economist Follow us: twitter.com/TheEconomist Like us: www.facebook.com/TheEconomist View photos: instagram.com/theeconomist/ The Economist videos give authoritative insight and opinion on international news, politics, business, finance, science, technology and the connections between them.