Former Arizona sheriff Joe Arpaio is in a statistical tie with Rep. Martha McSally
Martha Elizabeth McSallyHouse Dems highlight promising new candidates Trump poised for a September fight over border wall GOP rep weighs in on House dress code during floor speech MORE (R-Ariz.) in the Republican Senate primary in Arizona, according to a new poll.
The ABC15/OHPI poll shows Arpaio, who on Tuesday announced his plans to run for the Senate seat, has 29 percent support in the race.
McSally, who is also expected to jump into the race soon but has not made a formal announcement, has 31 percent support, according to the poll.
The poll was conducted Tuesday among 504 likely Republican voters. Its margin of error is 4.36 percent.
Arpaio gained popularity among immigration hardliners during his time as Maricopa County sheriff, proudly calling himself "America's toughest sheriff" and touting a strict approach to border security.
President Trump
Donald John TrumpHouse Democrat slams Donald Trump Jr. for ‘serious case of amnesia’ after testimony Skier Lindsey Vonn: I don’t want to represent Trump at Olympics Poll: 4 in 10 Republicans think senior Trump advisers had improper dealings with Russia MORE pardoned Arpaio last year after he was convicted of ignoring a court order related to racial profiling in his office.
McSally, who is expected to jump into the race soon, could stand to benefit from Ward and Arpaio's similar constituencies if the candidates split each other's votes.