In late April, the President announced that Nixon would again be his running mate. Eisenhower and Nixon were reelected by a comfortable margin in the November 1956 election.In early 1957, Nixon undertook another major foreign trip, this time to Africa. On his return, he helped shepherd the Civil Rights Act of 1957 through Congress. Through his first term, he pursued a Southern Strategy with policies, such as his desegregation plans, that would be broadly acceptable among Southern whites, encouraging them to realign with the Republicans in the aftermath of the civil rights movement. He nominated two Southern conservatives, Clement Haynsworth and G. Harrold Carswell to the Supreme Court, but neither was confirmed by the Senate.Nixon entered his name on the New Hampshire primary ballot on January 5, 1972, effectively announcing his candidacy for reelection. Virtually assured the Republican nomination, the President had initially expected his Democratic opponent to be Massachusetts Senator Edward M. Kennedy (brother of the late President), who was largely removed from contention after the July 1969 Chappaquiddick incident.