Jay Feely maintains a commanding position in the Arizona 1st Congressional District Republican primary through President Trump's January endorsement and superior fundraising that exceeds $1.7 million, bolstering his visibility ahead of the July 21 contest. Recent exchanges in a May 5 televised debate and a May 7 social media clash over immigration comments have drawn scrutiny to Joseph Chaplik, the former state representative who resigned his seat in March to focus on the race. These developments, alongside Chaplik's lower cash reserves, align with the market's 71 percent implied probability for Feely versus 26 percent for Chaplik. The remaining field shows minimal movement, with most candidates holding under 1 percent as traders weigh the advantages of early institutional backing in this open seat.