ABC World News Tonight with David Muir S2024E227 - Episode 227

Meteorologist Somara Theodore reports on the severe weather threat and flood watches along the East Coast as Hurricane Ernesto regains strength; MaryAlice Parks reports from western Pennsylvania, where Vice President Kamala Harris and Gov. Tim Walz campaigned ahead of the DNC as Harris leads Trump nationwide in our new poll; Matt Gutman is in Chicago with the latest on the city's security preparations ahead of the DNC; and more on ABC World News Tonight.