A Delaware Department of Justice spokesman says the younger Biden, who suffered a mild stroke in 2010, began experiencing the new symptoms after driving to Indiana for a family vacation. The 44-year-old was admitted to a Chicago hospital, then consulted with his doctor in Philadelphia.
The White House says the vice president had been home in Delaware and accompanied his son to Houston. It's not clear how long the vice president will stay, but he's scheduled to join the president in Scranton, Pa., this week.
Associated Press writer Josh Lederman contributed to this report from Washington.
Copyright 2013 The Associated Press.