Trader consensus favors Jay Feely at 71% implied probability to win Arizona's 1st Congressional District Republican primary on July 21, propelled by his early Trump endorsement and a fresh allegation that rival Joseph Chaplik made a racist remark about Feely's adopted sons, publicized May 13 amid the campaign's closing stretch. Chaplik, a state representative with local roots, sits at 25.4% despite leading a late-April NextGen poll 24%-15% over Feely among decided voters, where 54% remained undecided; high uncertainty persists with no post-May surveys. Chaplik skipped a May 5 televised debate featuring Feely and John Trobough, intensifying attacks labeling Feely a carpetbagger. The open seat after David Schweikert draws a crowded field, but others trail far behind.