Pence said at the tax event that he was "honored" by the former sheriff’s attendance, and called Arpaio a "great friend of this president and tireless champion of strong borders and the rule of law," to cheers from the crowd.
President Trump last year pardoned Arpaio, a vocal supporter of his on the campaign trail, after he was convicted of contempt of court for refusing to stop racially profiling Hispanic people at traffic stops for immigration checks.
Arpaio, who is running for retiring Sen. Jeff Flake’s (R-Ariz.) Senate seat, filed an appeal in January to have the conviction cleared.