2018 United States House of Representatives elections in Arizona
The 2018 United States House of Representatives elections in Arizona were held on November 6, 2018, to elect the nine U.S. representatives from the State of Arizona, one from each of the state's nine congressional districts. The elections coincided with the 2018 Arizona gubernatorial election, as well as other elections to the U.S. House of Representatives, elections to the United States Senate and various state and local elections. The 2018 general elections saw the Democratic party gain the 2nd Congressional district, thus flipping the state from a 5–4 Republican advantage  to a 5–4 Democratic advantage, the first time since the 2012 election in which Democrats held more House seats in Arizona than the Republicans. Overview. Results of the 2018 United States House of Representatives elections in Arizona by district: District 1. The 1st district is home to the Grand Canyon and stretches along the eastern and northeastern portions of the state and includes Casa Grande, Flagstaff, and Marana. This district has a significant Native-American population, making up 25% of the population in the district. This district is home to a number of Indian reservations, including the Gila River Indian  Community, Hopi Reservation, and the Navajo Nation. Incumbent Democratic Congressman Tom O'Halleran won election to his first term in 2016 with 50.90 percent of the vote over Republican nominee Paul Babeu. This district is one of the most competitive in the state with a PVI of R+2. In 2018, the district was one of 36 Democratic-held House districts targeted by the National Republican Congressional Committee.