Democratic presidential nominee Vice President Kamala Harris and running mate Minnesota Gov. Tim Walz arrive at a campaign rally at Desert Diamond Arena, Friday, Aug. 9, 2024, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Democratic presidential nominee Vice President Kamala Harris arrives at a campaign rally at Desert Diamond Arena, Friday, Aug. 9, 2024, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Supporters cheer as Democratic presidential nominee Vice President Kamala Harris speaks at a campaign rally at Desert Diamond Arena, Friday, Aug. 9, 2024, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Supporters cheer as Democratic presidential nominee Vice President Kamala Harris speaks at a campaign rally at Desert Diamond Arena, Friday, Aug. 9, 2024, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

People wait in line to get into a local arena before Democratic presidential nominee Vice President Kamala Harris and Democratic vice presidential nominee Minnesota Gov. Tim Walz speak at a campaign rally, Friday, Aug. 9, 2024, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Democratic presidential nominee Vice President Kamala Harris and running mate Minnesota Gov. Tim Walz visit a campaign office, Friday, Aug. 9, 2024, in Phoenix. (AP Photo/Julia Nikhinson)

Democratic presidential nominee Vice President Kamala Harris arrives as she is introduced by running mate Minnesota Gov. Tim Walz at a campaign rally at Desert Diamond Arena, Friday, Aug. 9, 2024, in Glendale, Ariz. (AP Photo/Julia Nikhinson)

Democratic presidential nominee Vice President Kamala Harris and running mate Minnesota Gov. Tim Walz stand on stage with from left, Sen. Mark Kelly, D-Ariz., and his wife former Rep. Gabby Giffords, at a campaign rally at Desert Diamond Arena, Friday, Aug. 9, 2024, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Democratic presidential nominee Vice President Kamala Harris speaks at a campaign rally at Desert Diamond Arena, Friday, Aug. 9, 2024, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Democratic presidential nominee Vice President Kamala Harris, with Democratic vice presidential nominee Minnesota Gov. Tim Walz, left, speaks at a campaign rally at UAW Local 900, Thursday, August 8, 2024, in Wayne, Mich. (AP Photo/Julia Nikhinson)

Democratic presidential nominee Vice President Kamala Harris and running mate Minnesota Gov. Tim Walz visit a campaign office, Friday, Aug. 9, 2024, in Phoenix. At left is Gwen Walz. (AP Photo/Julia Nikhinson)