Republican Kari Lake filed paperwork Tuesday to run for Sen. Kyrsten Sinema’s (I) seat in Arizona, laying the groundwork for a potential three-way race in a critical swing state.
Lake, who previously ran for Arizona governor, registered her Senate campaign committee with the Federal Elections Commission a week ahead of her expected campaign launch.
Pinal County Sheriff Mark Lamb (R) has already announced a run for Sinema’s seat, while Rep. Ruben Gallego (D-Ariz.) has launched a bid for the Democratic nomination. Former Arizona Senate candidate Blake Masters was reportedly weighing a run but has not made an unofficial announcement.