Arizona voters are heading to the polls for the primary elections, deciding major federal and state races, including a Republican faceoff for U.S. Senate between Kari Lake and Mark Lamb and a six-way Democratic contest in Arizona's 1st Congressional District. Voting sites will be open from 6 a.m. to 7 p.m., with results starting to come in around 8 p.m. The Arizona Republic has created a dot-density map to track voting results by precinct. Key races include tight Republican primaries influenced by Trump endorsements and competitive state Senate races that could shift control to the Democrats. Notably, several candidates on both sides are running unopposed and will advance to the general election. These primaries will set the stage for significant contests in the upcoming general election on November 5.