Arizona GOP Senate candidates sharpen attacks in final debate

Early voting in the Arizona primary is underway as the Republican candidates for Senate faced off in a tense debate Wednesday night. 

The debate, hosted by Newsmax, just days before former President Donald Trump is scheduled to campaign in the state, featured venture capitalist Blake Masters, businessman Jim Lamon and Michael McGuire. 

The GOP hopefuls are vying to take on incumbent Democratic Sen. Mark Kelly, who is considered one of the most vulnerable Democrats in the evenly divided Senate, as Republicans look to retake control in the midterm elections.