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FILE - Jimmy Kimmel appears at the 74th Primetime Emmy Awards in Los Angeles, Sept. 12, 2022. Celebrities are increasingly lending their star power to President Joe Biden, hoping to energize fans to vote for him in November 2024 or entice donors to open their checkbooks for his reelection campaign. (Photo by Richard Shotwell/Invision/AP, File)
FILE - Director George Clooney attends a special screening of "The Boys in the Boat," Dec. 13, 2023, in New York. Celebrities including Clooney are increasingly lending their star power to President Joe Biden, hoping to energize fans to vote for him in November 2024 or entice donors to open their checkbooks for his reelection campaign. (Photo by Evan Agostini/Invision/AP, File)
President Joe Biden speaks during a campaign event with former President Barack Obama moderated by Jimmy Kimmel at the Peacock Theater, Saturday, June 15, 2024, in Los Angeles. (AP Photo/Alex Brandon)
FILE - Julia Roberts attends the premiere of Netflix's "Leave the World Behind," Dec. 4, 2023, in New York. Celebrities including Roberts are increasingly lending their star power to President Joe Biden, hoping to energize fans to vote for him in November 2024 or entice donors to open their checkbooks for his reelection campaign. (Photo by Evan Agostini/Invision/AP, File)
President Joe Biden arrives for a campaign event with former President Barack Obama moderated by Jimmy Kimmel at the Peacock Theater, Saturday, June 15, 2024, in Los Angeles. (AP Photo/Alex Brandon)
Law enforcement officers carrying less-lethal-munitions, respond to protesters near the campaign event with President Joe Biden outside the Peacock Theater, Saturday, June 15, 2024, in Los Angeles. (AP Photo/Alex Brandon)
President Joe Biden speaks during a campaign event with former President Barack Obama moderated by Jimmy Kimmel at the Peacock Theater, Saturday, June 15, 2024, in Los Angeles. (AP Photo/Alex Brandon)
Law enforcement officers respond to protesters near the campaign event with President Joe Biden outside the Peacock Theater, Saturday, June 15, 2024, in Los Angeles. (AP Photo/Alex Brandon)
President Joe Biden speaks during a campaign event with former President Barack Obama moderated by Jimmy Kimmel, right, at the Peacock Theater, Saturday, June 15, 2024, in Los Angeles. (AP Photo/Alex Brandon)
President Joe Biden speaks during a campaign event with former President Barack Obama at the Peacock Theater, Saturday, June 15, 2024, in Los Angeles. (AP Photo/Alex Brandon)
FILE - Former President Barack Obama speaks in Athens, Greece, June 21, 2023. Celebrities including Obama are increasingly lending their star power to President Joe Biden, hoping to energize fans to vote for him in November 2024 or entice donors to open their checkbooks for his reelection campaign. (AP Photo/Petros Giannakouris, File)
President Joe Biden arrives for a campaign event with former President Barack Obama moderated by Jimmy Kimmel at the Peacock Theater, Saturday, June 15, 2024, in Los Angeles. (AP Photo/Alex Brandon)