Only two months before the scheduled election, the delegates to the New York State Democratic Convention nominated U.S. Attorney General Robert F. Kennedy as their candidate for U.S. Senator, favoring him 968 to 153 over Congressman Samuel S. Stratton. On the same day, the Liberal Party of New York nominated Kennedy as its candidate as well, while the Republican Party of New York renominated the incumbent U.S. Senator, Kenneth Keating. Kennedy was a resident of Massachusetts rather than New York, but New York law did not have a residency requirement for its candidates for the U.S. Senate. Later in the day, U.S. Senator Strom Thurmond of South Carolina introduced a proposed amendment to the United States Constitution that would require that a U.S. Senator to meet the same residence requirements as a voter "in the state he represents", commenting that "Recent occurrences have negated the clear intention of the Constitution. This circumstance should be remedied."