Two new polls found former Gov. Angus King (I) leading his Democratic and Republican competitors, but by a smaller margin than he was before the U.S. Chamber of Commerce and the National Republican Senatorial Committee launched attack ads to undermine his Senate candidacy. Both polls were done using robocalls to landlines only, a polling strategy that is not considered as accurate as using live interviewers to call cellphones and landlines. Still, the new data offer a revealing view into a race that is thought to be King’s to lose. The Democratic-leaning Public Policy Polling found King leading GOP nominee Charlie Summers by 8 points among likely voters. King got 43 percent to Summers’ 35 percent. Democratic nominee Cynthia Dill pulled 14 percent. The nonpartisan Maine People’s Resource Center found King leading Summers by 16 points among registered voters. King took 44 percent to Summers’ 28 percent and Dill’s 15 percent. (more…)