Republican U.S. Rep. Paul Gosar has defeated Democrat Johnnie Robinson in the redrawn 4th Congressional District covering much of western Arizona.
Cronkite News bases its projection on unofficial returns showing Gosar leading by a wide margin.
Gosar, who owns a dentistry practice, ousted first-term U.S. Rep. Ann Kirkpatrick, a Democrat, in 2010 in the 1st Congressional District.
He decided to seek re-election in the 4th District, which is considered friendlier territory for Republican candidates.
Robinson was making his first run for the U.S. House. Libertarian Joe Pamella and Richard Grayson of the American Elect Party also challenged Gosar.
The far-flung 4th Congressional District stretches from northwestern Arizona along the Colorado River to just north of Yuma and extends to include Prescott and areas north and east of the Valley.