1957, that the U.S. support Algeria's effort to gain independence from France. The following year, Kennedy authored A Nation of Immigrants (later published in 1964), which analyzed the importance of immigration in the country's history as well as proposals to re-evaluate immigration law. In 1958, Kennedy was re-elected to a second term in the Senate, defeating Republican opponent, Boston lawyer Vincent J. Celeste, by a margin of 874,608 votes, the largest margin in the history of Massachusetts politics. It was during his re-election campaign that Kennedy's press secretary at the time, Robert E. Thompson, put together a film entitled The U.S. Senator John F. Kennedy Story, which exhibited a day in the life of the Senator and showcased his family life as well as the inner workings of his office to solve Massachusetts-related issues. It was the most comprehensive film produced about Kennedy up to that time. In the aftermath of his re-election, Kennedy began preparing to run for president by traveling throughout the U.S. with the aim of building his candidacy for 1960. When it came to conservation, Kennedy, a Massachusetts Audubon Society supporter, wanted to make sure that the shorelines of Cape Cod remained unsullied by future industrialization. On September 3, 1959, Kennedy cosponsored the Cape Cod National Seashore bill with his Republican colleague Senator Leverett Saltonstall. Kennedy's father was a strong supporter and friend of Senator Joseph McCarthy. Additionally, Bobby Kennedy worked for McCarthy's subcommittee, and McCarthy dated Kennedy's sister Patricia. Kennedy told historian Arthur M. Schlesinger Jr., "Hell, half my voters [particularly Catholics] in Massachusetts look on McCarthy as a hero." In 1954, the Senate voted to censure McCarthy, and Kennedy drafted a speech supporting the censure. However, it was not delivered because Kennedy was hospitalized at the time. The speech put Kennedy in the apparent position of participating by "pairing" his vote against that of another senator and opposing the censure. Although Kennedy never indicated how he would have voted, the episode damaged his support among members of the liberal community, including Eleanor Roosevelt, in the 1956 and 1960 elections. 1960 presidential election On December 17, 1959, a letter from Kennedy's staff which was to be sent to "active and influential Democrats" was leaked stating that he would announce his presidential campaign on January 2, 1960. On January 2, 1960, Kennedy announced his candidacy for the Democratic presidential nomination. Though some questioned Kennedy's age and