For his campaign, Romney assembled a veteran group of Republican staffers, consultants, and pollsters. He was little-known nationally, though, and stayed around the 10 percent support range in Republican preference polls for the first half of 2007. He proved the most effective fundraiser of any of the Republican candidates and also partly financed his campaign with his own personal fortune. These resources, combined with the mid-year near-collapse of nominal front-runner John McCain's campaign, made Romney a threat to win the nomination and the focus of the other candidates' attacks. Romney's staff suffered from internal strife; the candidate himself was at times indecisive, often asking for more data before making a decision.