Speaker of the Arizona House of Representatives Russell Bowers (R), testifies during the fourth hearing of the Select Committee to Investigate the January 6th Attack on the United States Capitol on June 21, 2022.

Rusty Bowers, the Republican speaker of the Arizona House who delivered gripping testimony earlier this summer to the House committee investigating the Jan. 6 Capitol riot, lost his bid for a state Senate seat on Tuesday to a candidate backed by former President Donald Trump, NBC News projected.

Armed with Trump's endorsement, former state Sen. David Farnsworth held a lead of more than 20 points over Bowers in their bid for Arizona's 10th District as of 1:15 a.m. ET.