The presidential election of 1984 was a very partisan election for Arizona, with just under 99% of the electorate voting for either the Democratic or Republican parties, and only four parties appearing on the ballot.[1] Nearly every county in Arizona voted with majorities for Reagan, a particularly strong turnout even in this typically conservative-leaning state. Reagan's win in Arizona was largely the result of a lopsided 45% victory margin in Maricopa County, the state's most populated county and home to Phoenix. Mondale did best in predominantly Native American Apache County, which was typical of his gains vis-à-vis Jimmy Carter in Native American counties throughout the nation; Reagan thus became the first-ever Republican to win the White House without carrying this county.[2] Mondale also won heavily unionized copper-mining Greenlee County; albeit his performance there was the worst by a Democrat since statehood.
Arizona weighed in for this election as sixteen points more Republican than the national average. Reagan won the election in Arizona with a decisive 34-point landslide. No Republican candidate has received as strong of support in the American West at large as Reagan did.
Results
1984 United States presidential election in Arizona[3]