Mills is preparing to launch a Senate campaign against Collins as early as next week, the Associated Press reported.

This year's election year battle for control of the U.S. Senate is intensifying, as Republicans prepare to push through President Donald Trump's Supreme Court nominee in the closing weeks of a ...

Democratic U.S. Senate candidate Mark Kelly's lead over Arizona Republican incumbent Martha McSally is holding steady with less than a week to go until an election that could determine whether ...

North Carolina's Cooper touted $14.5 million in contributions in what is expected to be among the most competitive midterms races.