Robert Francis Kennedy, Jr. (born January 17, 1954) is an American radio host, environmental activist, author and attorney specializing in environmental law. An Irish American, he is a son of Robert Francis "Bobby" Kennedy, the United States Senator for New York and the 64th U.S. Attorney General. He is a nephew of U.S. President John Fitzgerald "Jack" Kennedy. Kennedy is President of the Board of Waterkeeper Alliance, a non-profit focused on grass-roots efforts to protect and enhance waterways worldwide. He currently co-hosts Ring of Fire, a nationally syndicated American radio program. Kennedy has written three political books and two children's books. Kennedy has several times said he was considering running for elective office in the state of New York, but to date he has decided against running for office. In August 2014, Kennedy married actress Cheryl Hines, his third wife. Kennedy is an avid white-water rafter and has a longstanding interest in environmental issues related to water resources, water pollution and the Hudson River.

Robert Francis "Bobby" Kennedy (November 20, 1925 – June 6, 1968), commonly known by his initials RFK, was an American politician from Massachusetts. He served as a Senator for New York from 1965 until his assassination in 1968. He was previously the 64th U.S. Attorney General from 1961 to 1964, serving under his older brother, President John F. Kennedy and his successor, President Lyndon B. Johnson. An icon of modern American liberalism and member of the Democratic Party, Kennedy ran for the Democratic presidential nomination in the 1968 election.

After serving in the U.S. Naval Reserve as a Seaman Apprentice from 1944 to 1946, at Harvard College and Bates College, Robert Kennedy graduated from Harvard and the University of Virginia School of Law. Prior to entering public office, he worked as a correspondent to the Boston Post and as an attorney in Washington D.C. He gained national attention as the chief counsel of the Senate Labor Rackets Committee from 1957 to 1959, where he publicly challenged Teamsters President Jimmy Hoffa over the corrupt practices of the union, and published The Enemy Within, a book about corruption in organized labor.

Robert F. Kennedy (1925–1968) was Attorney General of the United States, Senator from New York, and the assassinated Democratic candidate for the 1968 Presidential election.

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