FILE - Republican presidential candidate former President Donald Trump speaks at a campaign rally, July 9, 2024, in Doral, Fla. Trump will have one last chance Saturday, July 13, to dramatically unveil his vice presidential pick on a rally stage before the Republican National Convention kicks off in Milwaukee next week. Trump's rally in western Pennsylvania, at the Butler Farm Show just outside Pittsburgh, comes as the former reality TV star and tabloid hound continues to tease his pick, working to drum up maximum attention. (AP Photo/Rebecca Blackwell, File)
President Joe Biden exits Air Force One, on arrival to Detroit Metropolitan Wayne County Airport in Detroit, Friday July 12, 2024, for a campaign event. (AP Photo/Jacquelyn Martin)
Christl Mahfouz Moodie, owner of Ace Specialties, official merchandise provider for the Trump National Committee, prepares hats for sale in the Fiserv Forum ahead of the 2024 Republican National Convention, Friday, July 12, 2024, in Milwaukee. (AP Photo/Alex Brandon)
President Joe Biden gestures while speaking to supporters at a campaign event at Renaissance High School in Detroit, Friday, July 12, 2024, in Detroit. (AP Photo/Carlos Osorio)
FILE - Former first lady Melania Trump leaves after voting in the Florida primary election in Palm Beach, Fla., March 19, 2024. Former first lady Melania Trump will attend the Republican National Convention next week in Milwaukee. That’s according to two people familiar with her plans who spoke on condition of anonymity before full details are released (AP Photo/Wilfredo Lee, File)
Supporters for President Joe Biden hold up signs at a campaign event as they wait for the event to begin, Friday, July 12, 2024, in Detroit. (AP Photo/Carlos Osorio)
Darrin Bruce works on the exterior lighting on the Fiserv Forum ahead of the 2024 Republican National Convention, Thursday, July 11, 2024, in Milwaukee. (AP Photo/Alex Brandon)
Supporters for President Joe Biden hold up signs at a campaign event as they wait for the event to begin, Friday, July 12, 2024, in Detroit. (AP Photo/Carlos Osorio)
A supporter of Republican presidential candidate former President Donald Trump holds a sign as President Joe Biden speaks to supporters at Garage Grill & Fuel Bar during a campaign stop in Northville, Mich., Friday July 12, 2024. (AP Photo/Jacquelyn Martin)