State Sen. Kelly Armstrong, R-Dickinson, announced Thursday that he will be running for the U.S. House.
Armstrong resigned as the state GOP chairman on Tuesday.
"I'm running on my record and that's the point. I'm going 100 miles per hour to try to prove to people why I'm the best guy to do that. Tom will be doing the same thing. Tom has been doing the same thing," said Armstrong.
Five Republicans are now vying for Kevin Cramer's seat, and so far, only one Democrat.