District 47 Republicans endorsed Michael Dwyer this week as their nominee to seek the Senate seat being vacated by Sen. Ralph Kilzer.
Dwyer, a Bismarck attorney, won the nomination over Tom Trenbeath, former North Dakota chief deputy attorney general and a former legislator.
Kilzer, a Republican, is retiring at the end of his term. He was first elected to the state House in 1996 and the state Senate in 1998.
Dwyer, a water law expert, is co-owner of Clearwater Communications and was a longtime basketball coach for Shiloh Christian School.
District 47 Republicans, who met Wednesday night, also endorsed incumbents George Keiser and Larry Klemin to run for the state House.
Also Wednesday, District 35 Republicans endorsed incumbents Karen Karls and Bob Martinson for House.
District 35 Republicans are still seeking a candidate to challenge Sen. Erin Oban, D-Bismarck. Karls, district chairwoman, said the district committee will pick an endorsee if it finds a suitable candidate.
Meanwhile, Republicans in the other Bismarck district up for election this year, District 7, recently endorsed incumbents Nicole Poolman for Senate and Rick Becker and Jason Dockter for House.
Democrats hold a convention for Bismarck-area districts on Feb. 10.