Seeger was a leftist, not afraid to speak his views openly, or to support unpopular causes such as Communism. Seeger's musical career was sometimes limited by his views. The American Federal Bureau of Investigation kept a on Seeger, and the House Un-American Activities Committee put pressure on him, because of his beliefs. He refused to change his views, or to stop doing what he believed was right. Because of this, Seeger was in many places, and could not play music there. He was also not allowed to appear on television for most of the 1950s and 1960s. 