TULSA, Okla. (AP) — Oklahoma U.S. Rep. Markwayne Mullin says he will seek re-election next year, breaking a pledge he'd made to only serve three terms in the House.

Mullin announced his decision to run again in a video posted Tuesday. The Republican congressman said he knew he'd draw criticism by breaking his word but felt he could still make a difference for Oklahomans by remaining in the U.S. House.

Mullin was a political newcomer when he was first elected in 2012 to represent Oklahoma's 2nd Congressional District, which stretches across 24 eastern Oklahoma counties from the Kansas state lin...