Tucson Democrat Raรบl Grijalva will be calling Washington, D.C., home for another two years.
With the first round of election results posted shortly after 8 p.m., Grijalva already had a sizable lead over his Republican opponent, businessman Nick Pierson.
Grijalva had 60.9 percent of the vote while Pierson had 39.1 percent, in early results.
