Kari Lake, a former TV news anchor who refashioned herself as an ally and protégé of Donald J. Trump, officially announced she was running for the Senate in Arizona on Tuesday, offering a dark vision of America and pitching herself as a fighter ready to take on the media and the left.
Ms. Lake, who unsuccessfully ran for governor last year and never conceded her loss, mentioned that past election only once. She instead used her announcement speech to lavish praise on Mr. Trump, who endorsed her and called her “one of the toughest fighters in our movement” in a short video aired at the rally.