Just 17 percent of Arizona voters knew who Cardon was in February, but in May, 35 percent recognized him. Flake, who has been in Congress for more than a decade, is recognized by six in ten voters.
Carmona is still an unknown to two out of three voters, giving him room to grow as more voters become acquainted with him in the general election. Carmona is the sole Democrat in the primary; another Democrat, Don Bivens, dropped out in March.
The poll of 500 Arizona voters was conducted May 17-20 using automated telephone interviews, and had an overall margin of error of plus or minus 4.4 percentage points.
The Hill rates this race as leaning Republican.