 While Denver elections are non @-@ partisan , Democrats have long held the majority sway on Denver politics with most officials elected citywide having Democratic Party affiliation . In federal elections , Denverites also tend to vote for Democratic candidates , voting for the Democratic Presidential nominee in every election since 1960 ( excluding 1980 and 1972 ) . The office of Denver 's Mayor has been occupied by a Democrat since the municipal general election of 1963 . Denver is represented at the federal level by congresswoman Diana <unk> , a Democrat representing Colorado 's 1st congressional district , which includes all of Denver and parts of Arapahoe County . 
