Beau Biden, the Delaware attorney general and son of Vice President Joe Biden, is undergoing medical tests in Texas after being hospitalized last week for weakness and disorientation, his office said last night.

The younger Biden, 44, who suffered a mild stroke in 2010, began experiencing the latest symptoms last Wednesday after driving to Indiana for a family vacation, a spokesman said.

He was admitted to Northwestern Memorial Hospital in Chicago and traveled the next day to Jefferson University Hospital in Philadelphia to consult with his doctor.

Beau Biden is now undergoing tests in Houston to determine the cause of his symptoms.