ABC World News Tonight with David Muir Full Broadcast - July 23, 2024

In Wisconsin, Mary Bruce reports on Vice Pres. Kamala Harris hitting the campaign trail in the battleground state for the first time as the presumptive Democratic nominee; sources told ABC News the Secret Service has urged Donald Trump’s campaign to stop holding outdoor rallies – Pierre Thomas has the latest details, including the resignation of Secret Service Director Kim Cheatle’s 10 days after the attempted assassination of the former president; Mola Lenghi has details on tourists at Biscuit Basin in Yellowstone National Park left running for safety after a geyser suddenly exploded, sending a black plume of steam and debris flying in the air; and more on tonight’s broadcast of World News Tonight with David Muir.