WASHINGTON — Vice President Joe Biden may have instigated World War III last night during a last-minute campaign stop at Georgetown University. The gaffe-prone politician was delivering a short speech encouraging students to vote when he accidentally declared war on Iran. “We’re still not entirely sure what happened,” White House aide Michael Howard explained. “One minute he’s reading from a prepared statement about the Founding Fathers and the next he’s assembling the Joint Chiefs of Staff to authorize a pre-emptive