A new nonpartisan poll of the Maine Senate race shows former Gov. Angus King (I) with a very solid lead over his Republican and Democratic challengers. In a horse-race matchup of likely voters, King led with 55 percent of those polled. Republican Charlie Summers took 27 percent, while Democrat Cynthia Dill took 7 percent. Nine percent didn't know for whom they would vote. Those numbers track with another nonpartisan poll from last month, which had King at 50 percent. King is widely expected to caucus with Democrats if he wins, though he has not publicly announced which party he would caucus with, if any. (more…)