Rancher and businessman Mark Gordon leads a crowded Republican primary field in the race for the state’s lone House seat, according to a new poll released by his campaign.

The survey showed Gordon ahead of former two-term state Treasurer Cynthia Lummis by 16 points, 39 percent to 23 percent, with 30 percent undecided. The primary is Aug. 19.

“I am extremely encouraged by the support my campaign is receiving,” Gordon said in a statement.

The poll of 401 likely GOP primary voters was conducted April 26-28 by the Republican firm Dresner, Wickers and Associates. The error margin was 4.1 points.

Wyoming’s at-large House seat is being vacated by Rep. Barbara Cubin (R). Although the state leans Republican, Democrats are high on 2006 nominee Gary Trauner, who came within less than 1 point of beating Cubin and is running again.

Also registering in Gordon’s poll were GOP primary candidates Bill Winney, who challenged Cubin in the 2006 Republican primary, and state Rep. Dan Zwonitzer. Winney garnered 6 percent support; Zwonitzer had 2 percent.

— David M. Drucker