Former Maine Gov. Angus King (I) plans to announce tonight that he is going to run for the U.S. Senate, the Portland Press Herald reports.
"A run by King as an independent for the seat being vacated by GOP Sen. Olympia Snowe of Maine is sparking fears among some Democrats that the socially liberal former two-term governor could siphon off enough votes from a Democratic Senate nominee to throw the election to the GOP candidate."