A new documentary about Republican presidential candidate Mitt Romney premiered Friday night at the Sundance Film Festival in Utah. The film, "Mitt," is an extraordinarily intimate look at the former Massachusetts governor as he ran for president twice, in 2008 and 2012. Director Greg Whiteley had impressed Romney with his 2005 documentary "New York Doll," which brilliantly chronicled a broken-down rock musician's conversion to Mormonism, and for the new film, Romney gave Whiteley unprecedented freedom to record behind-the-scenes moments as the candidate and his family endured the trials of two presidential campaigns..... the old lack of confidence came out again...