On March 6, Public Policy Polling released a poll showing these results for the November 2012 Maine U.S. Senate race: Independent Angus King 36%, Democrat Chellie Pingree 31%, Republican Charlie Summers 28%, undecided or other 5%.
On the evening of March 5, King said that he will be an independent candidate for U.S. Senate this year. The poll was taken prior to that announcement. The poll’s assumption of who the Republican and Democratic nominees will be is just a guess, because the primary won’t be until June.
Angus King was elected Governor of Maine as an independent in 1994, and re-elected easily as an independent in 1998.