The daughter of Sen. Joseph R. Biden Jr. (D-Del.) was arrested on a misdemeanor charge of obstructing a police officer outside a Chicago bar.
Ashley Blazer Biden, 21, of Wilmington, Del., was with a group of people on a North Side street where several bars are located when someone else threw a bottle at an officer, police said.
When police tried to arrest another person, Biden blocked the officer's path and made intimidating statements, officer JoAnn Taylor said.
Biden was later released and is scheduled to appear in court Sept. 20.
Sen. Biden's spokeswoman, Margaret Aitken, declined to comment, calling it a private, family matter.