Robert F. Kennedy and Edward M. Kennedy both ran for president. Robert served as John’s U.S. attorney general and later became a U.S. senator from New York. He likely would have captured the 1968 Democratic nomination for president, but was assassinated. Edward served as a U.S. senator from Massachusetts from 1962 until his death in 2009. He was the fourth-longest serving U.S. senator in American history—behind Robert Byrd, Daniel Inouye, and Strom Thurmond.