Joseph Robinette "Beau" Biden III was an American politician, lawyer, and officer in the Army Judge Advocate General's Corps from Wilmington, Delaware. The oldest child of President Joe Biden and Neilia Hunter Biden and a member of the Democratic Party, he served as the 44th attorney general of Delaware from 2007 to 2015 and was a major in the Delaware Army National Guard in the Iraq War. He died of glioblastoma in 2015 at the age of 46. At the time of his death, he was a candidate for the Democratic nomination for governor of Delaware in the 2016 gubernatorial election.