JACQUES BILLEAUD and SEJAL GOVINDARAO.

Five Democrats and three Republicans are running in a July 15 primary election in southern Arizona to succeed the late Democratic Rep. Raúl Grijalva. His daughter Adelita Grijalva is regarded as the frontrunner. The Democratic primary also features former state legislator Daniel Hernandez, who is credited with helping save then-U.S. Rep. Gabrielle Giffords’ life when she was shot in 2011 outside a Tucson grocery store. Raúl Grijalva was a champion of environment, Native American and immigrant causes. He died in mid-March at age 77. The district is a Democratic stronghold and stretches across most of the state’s border with Mexico.