A poll released today by Public Policy Polling, a national Democratic firm, found that independent former Gov. Angus King would narrowly win a three-way race against Democratic Congresswoman Chellie Pingree and Republican Secretary of State Charlie Summers. Former independent Gov. Angus King, left, Democratic Rep. Chellie Pingree and Secretary of State Charlie Summers, a Republican. King garners 36 percent of the vote to Pingree's 31 percent and Summers' 28 percent because he pulls away 35 percent of Democratic voters from Pingree and garners 53 percent of the vote from independents, compared to 25 percent of the GOP vote, PPP's poll...