Angus King, the former independent governor of Maine, plans to announce tonight that he is running for US Senate in the race to replace retiring Olympia Snowe, according to two close political advisors.
King served as governor from 1995 through 2003. His entry in the race as a well-known independent will complicate life for political handicappers who have been trying to determine whether the seat will go into Democratic or Republican hands. The outcome could decide which party controls the US Senate.
Several other candidates are also exploring runs, including on the Democratic side, former Governor John Baldacci and Congresswoman Chellie Pingree. Among the Republicans considering entering the race are Secretary of State Charlie Summers, Treasurer Bruce Poliquin and Attorney General William Schneider.
Snowe announced her retirement last week after 17 years in the Senate.