The following Bottom Lines have been updated following this week's Senate primaries in Maine, Nevada and Virginia


When Republican U.S. Sen. Olympia Snowe announced in early 2012 that she would not run for re-election, the best-known candidate to enter the field was former Gov. Angus King, who served two terms as an independent and opted to keep that label in the Senate race. He faced Democrat Cynthia Dill, who got no support from her party, and Republican Charles Summers in the general election. King took 53 percent of the vote to 31 percent for Summers and 13 percent for Dill. This cycle, King will get a less challenging contest than he did six years ago. He will face Democratic nominee Zak Ringelstein, a teacher, and Republican nominee Eric Brakey, a state Senator in November. Construction company owner Benjamin Pollard is running as an independent. None of these candidates poses a threat to King. As such, the race is now rated as Solid Independent.


U.S. Sen. Dean Heller has the unfortunate distinction of occupying the most vulnerable of the

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