Back home, the most critical issue facing the nation in the early 1960s was the intensification of the civil rights movement. As a candidate, Kennedy had promised vigorous action on civil rights, but as president he did little to follow through on his promises. With southern Democrats occupying key positions in Congress and threatening to block any civil rights proposals, Kennedy hesitated to upset this critical component of his political base. Following Kennedy’s death in 1963, President Johnson succeeded in breaking the legislative logjam and signed into law three major pieces of civil rights legislation. He did so under considerable pressure from the civil rights movement.