Mark Lamb holds a strong lead in the AZ-05 race due to the district’s consistent Republican tilt, including a Cook PVI of R+10 and prior margins exceeding 20 points. The open seat, vacated by retiring Rep. Andy Biggs, features Lamb’s July primary victory and early endorsement from President Trump, alongside superior fundraising exceeding $1.7 million. As former Pinal County sheriff, Lamb emphasizes border security and law enforcement experience. Elizabeth Lee won her Democratic primary but trails significantly in resources and faces structural headwinds in this East Valley district spanning parts of Maricopa and Pinal counties. Forecasters rate the contest Safe or Solid Republican ahead of the November 3 general election, aligning with trader consensus on the low likelihood of an upset.