Republican Danny Tarkanian made his candidacy official for Nevada's newly created 4th Congressional District, an area that favors Democrats by a 10 percentage point margin, according to the latest voter registration numbers from the secretary of state's office.
Tarkanian ran unsuccessfully for the GOP's U.S. Senate nomination in 2010, losing to Sharron Angle in a crowded primary field. Angle lost to Democratic Majority Leader Harry Reid in the general election.
Tarkanian's wife, Amy, resigned last month as chairwoman of the Nevada Republican Party to help her husband campaign.
Tarkanian could face state Sen. Barbara Cegavske, R-Las Vegas, in a primary run. Cegavske is in the middle of her last term in the state Senate and was the first GOP candidate to announce her intent to seek the U.S. Senate seat.
Democratic state Sen. Steven Horsford, the chamber's majority leader, also intends to run for that seat.
In Nevada's three other federal races, former Rep. Dina Titus plans to run for the 1st district seat being vacated by Rep. Shelley Berkley, who is running against Republican Sen. Dean Heller. Heller was appointed to the Senate following the resignation of John Ensign.
Edward Hamilton, a frequent candidate, also filed as a Republican U.S. Senate contender.
Rep. Mark Amodei, R-Nev., who won a special election in September to replace Heller in the U.S. House, has not yet drawn any opposition.
In the 3rd district race, incumbent Republican Rep. Joe Heck faces an announced challenge from Assembly Speaker John Oceguera, D-Las Vegas.
For statehouse contests, Assemblyman Ira Hansen, R-Sparks, was the first candidate to file in Carson City. Hansen is seeking a second term in a Republican-friendly district that after reapportionment encompasses parts of seven counties stretching from the Nevada-Oregon line to the California boundary south of Tonopah.
Assemblyman Pete Goicoechea, R-Eureka, filed for the state Senate in District 19, an area that runs from the Nevada-Idaho line to southwest of Las Vegas and includes the eastern half the state.
Incumbent Assemblyman Kelly Kite, R-Minden, filed for re-election to a second term, and is being challenged by fellow Republican Jim Wheeler to represent District 39.
Delmar Leatham filed as a Republican for Assembly District 36 in Las Vegas.
The candidate filing period ends at 5 p.m. March 16.