MOORE — Oklahoma Republicans on Saturday elected a Tulsa County businessman as their new state chairman and adopted a platform that calls for penalizing school districts for teacher walkouts and demanding floor votes in the Legislature on abolishing abortion.

David McLain, of Skiatook, won a first ballot victory over Daren Ward, of Oklahoma County, and Darren Gantz, of Tulsa County, to serve as chairman of the party that leads the state in voter registration and controls every statewide office and the Legislature.

“I am truly a grassroots man,’’ McLain told nearly 1,000 delegates. “I have knocked on thousands of doors with you.”

McLain, 48, who owns a small construction company and served as Tulsa County GOP chairman, will replace Pam Pollard, of Oklahoma County, who has been state chair since 2015.