A close race is expected in the battleground state of Arizona for the Senate seat, with endorsements from Hillary Clinton for Democrat Ruben Gallego, who is facing conservative firebrand Kari Lake.
Key Points
Arizona Senate race is crucial for determining the balance of power in Congress
Close matchup between Democrat Ruben Gallego and Republican Kari Lake
Endorsements from Hillary Clinton and progressive veterans group Common Defense
Pros
High-profile endorsements could boost candidate visibility