ROCK SPRINGS, Wyo. (AP) — Pete Gosar has stepped down as chairman of the Wyoming Democratic Party and announced that he's running for governor

Gosar announced his candidacy Saturday afternoon at the Democratic Party convention in Rock Springs.

The 46-year-old Gosar lives in Laramie and works as a pilot for the state of Wyoming.

Gosar ran four years ago for governor, losing to Democrat Leslie Petersen in the 2010 Democratic primary. Petersen later lost in the general election to Republican Gov. Matt Mead.

Petersen of Jackson likewise had stepped down as Democratic Party chairwoman before her unsuccessful run for governor four years ago.

Mead is seeking re-election and faces challenges in the Republican primary from State Superintendent of Public Instruction Cindy Hill and Taylor Haynes, a retired physician.