ABC News chief business correspondent Rebecca Jarvis reports on what set off a stock market plunge on Wall Street on Monday.
Part of the West Coast is in the path of an atmospheric river storm, which is triggering heavy rain and could lead to flooding.
One student said his commute to school is like passing through a "war zone."
Louis Dejoy said the postal service is adding capacity and will be ready for the holiday season.
The Powerhouse Roundtable breaks down the latest news on “This Week.”
George Stephanopoulos interviews Dr. Anthony Fauci on “This Week.”