Arizona’s U.S. Senate seat is emerging as the toughest for Republicans to hold in 2020.
Sen. Martha McSally, the Republican incumbent, must defeat a challenge from astronaut and gun control advocate Mark Kelly, and she must succeed in a state that rejected her Senate bid in 2016.
Democrats are beginning to feel confident they’ll win Arizona and ultimately retake the Senate majority, which Republicans currently hold by a 53-47 margin.
McSally was appointed to the seat late last year following the death of Sen. John McCain. Former GOP Sen. Jon Kyl served as an interim replacement for three-and-a-half months before McSally’s appointment.