A new poll ahead of Aug. 9 Dem primary has incumbent up over challenger by 8.
Frontrunner Dan Sullivan hits Lt. Gov. Mead Treadwell in direct mail for the first time.
Party contests still loom in Louisiana and Alaska, two key races for Senate Republicans.
Sen. Susan Collins is a rare breed in the Republican Party.
Rep. Roger Williams (R-Texas) is making moves to challenge National Republican Congressional Committee Chairman Greg Walden (R-Ore.) for the chairmanship after this fall's elections.
"You told Kansans you would give them your word," Milton Wolf said before their primary.
Businessman David Perdue (R) has a comfortable lead over former charity executive Michelle Nunn (D), according to a new Republican poll.
Perdue leads Nunn 49 percent to 40 percent in the automated poll, conducted by the new firm Vox...
The Montana Democratic senator faces scrutiny over his 2007 Army War College paper.
Alaska Senate candidate Dan Sullivan's (R) campaign is out with a new ad featuring the father of an Alaskan soldier who died in Iraq who says that Sullivan shares his son's patriotic values.
New ad targets McConnell votes against equal pay legislation.