Session of the Arizona Legislature
The 53rd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 2017 to December 31, 2018, during the second two years of Doug Ducey's first full term in office. Both the Senate and the House membership remained constant at 30 and 60, respectively. Democrats gained one seat in the Senate, leaving the Republicans with a 17-13 majority. Republicans also maintained an 35–25 majority in the House after losing one seat to the Democrats.