OMAHA, Neb. (AP) — Omaha lawyer David Domina is planning to run for U.S. Senate and give Nebraska Democrats their first candidate for Republican Mike Johanns' seat.

Democratic Party Chairman Vince Powers said Monday that Domina plans to announce his campaign at the State Capitol on Tuesday morning.

Domina, 62, has been considering running since last fall. He says he hopes to help eliminate the dysfunction in Congress by selflessly pursuing solutions to problems.

"Our country is teetering. It does not feel stable," Domina said. "We cannot have the strongest and most influential nation on earth, and we cannot be secure at home or away if our divisions and refusal to work together as citizens cause our government to shut down."

Domina is a prominent lawyer who represents Nebraska landowners challenging the state law that allowed the Keystone XL pipeline to advance. Domina also won a $1.26 billion judgment for cattlemen who accused a large slaughterhouse of manipulating prices.

Powers said that even though Domina hasn't held elected office before, he is well known from his legal career.

"The key will be that the more people meet Dave, the more people will vote for Dave," Powers said. "He's spent his career solving problems."

Domina served as a special prosecutor for the impeachment trials of former University of Nebraska Regent David Hergert in 2006 and former Attorney General Paul Douglas in 1984.

Johanns decided not to seek re-election. The race for his seat has already attracted four Republicans and one independent candidate.

The Republicans are Omaha banker Sid Dinsdale, Omaha attorney Bart McLeay, former Nebraska State Treasurer Shane Osborn and Midland University President Ben Sasse. Jim Jenkins, a central Nebraska cattle rancher, is running as a nonpartisan candidate, but he previously identified as a Democrat.

Powers said he doesn't expect there to be a primary for the Democratic nomination, so Domina will have a chance to introduce himself to more voters this spring.