“Honestly, if this president and this Congress were doing things that were even remotely acceptable, I wouldn’t be running for the U.S. Senate,” Mills said in her launch video.

Mills’ formal entry into Maine’s Senate race Tuesday sets up one of several primaries that could be fought explicitly or implicitly on the issue of age.

“None of them have ever won an election. I have. I won two statewide races,” said Mills of her primary opponents.