Delaware Attorney General Beau Biden is being transferred from a Delaware medical center to a hospital in Philadelphia for further observation and testing after a mild stroke. Biden is the oldest son of Vice President Joe Biden. He remains in stable condition at Christiana Care hospital in Newark. He is alert with full motor and speech skills, according to a statement from the vice president's office. The statement says Beau Biden is to be transferred Tuesday afternoon to Thomas Jefferson University Hospital in Philadelphia. The statement says the entire family is thankful to the doctors who have cared for Beau Biden.