As a U.S. Senator from Texas, Ralph Yarborough sponsored legislation that created Padre Island National Seashore, Guadalupe Mountains National Park and the Big Thicket National Preserve. As a leader of liberal Democrats in the state, Yarborough incurred the enmity of two crafty Texas politicians, Lyndon B. Johnson and Allan Shivers. Yarborough failed in two attempts to wrest the governorship from Shivers. In 1957 Yarborough was elected to the Senate, where he was one of five Southern senators to vote for the Civil Rights Act of 1957 and one of three Southern senators to vote for the Voting Rights Act of 1965. He defeated future president George H.W. Bush in a Senate race in 1964. Democratic Party feuding between Yarborough and Gov. John Connally in part prompted John F. Kennedy’s fatal trip to Texas in November 1963. Lloyd M. Bentsen Jr. defeated Yarborough in the Democratic primary of 1970 and then won over Bush in the general election.