Republican Senate hopeful Martha McSally, who was locked in a too-close-to-call race with Democrat Kyrsten Sinema, called her opponent and conceded Monday after Sinema's lead widened.
The concession marked the end of a heated neck-and-neck battle between McSally and Sinema over who would fill the seat U.S. Sen. Jeff Flake decided not to defend.
McSally wrote a congratulatory message to Sinema on Twitter Monday.
"I wish her success," McSally wrote. "I'm grateful to all those who supported me in this journey. I'm inspired by Arizonans' spirit and our state's best days are ahead of us."
In a video attached to the tweet, McSally said she just called Sinema to congratulate her on becoming Arizona's first female senator "after a hard-fought battle."