TOPEKA (AP) — Independent candidate Greg Orman has picked a western Kansas legislator as his running mate in his campaign for governor.

Orman announced Wednesday that state Sen. John Doll of Garden City is leaving the Republican Party to run for lieutenant governor. Doll was in his hometown to register as an unaffiliated voter. Orman is a Kansas City-area businessman at the center of a national movement to elect independent candidates. He ran for the U.S. Senate in 2014.

Doll is a former Garden City mayor who served four years in the House before winning his Senate seat in 2016. He ran unsuccessfully for Congress in 2006 as a Democrat.

Doll resigned from his Senate committee assignments. Republican Senate President Susan Wagle said chamber rules prevent an independent lawmaker from serving on committees.