Act of 1965, while not voting on the Civil Rights Act of 1968 or the confirmation of Thurgood Marshall to the U.S. Supreme Court. In March 1968, Johnson appointed Harris to the National Advisory Commission on Civil Disorders. He quickly became one of its most active members and was deeply concerned about economically deprived inner-city African Americans. He also strongly supported agricultural programs, the Arkansas River Navigation Program, and the Indian health programs, which were all very popular in Oklahoma. Despite being strongly liberal from an increasingly conservative state, he was elected to a full term in 1966, defeating attorney Pat J. Patterson, 54% to 46%. Patterson had tried to unseat Harris by announcing his support for a constitutional amendment proposed by Senator Everett M. Dirksen to allow school boards to provide for prayers in public schools. Dirksen's amendment had enthusiastic political support in Oklahoma, but Harris opposed it in a public letter: "I believe in the separation of church and state and I believe prayer and Bible reading should be voluntary". During his Senate term, Harris also served briefly as chairman of the Democratic National Committee, preceded and succeeded in that position by Larry O'Brien. Harris was one of the final two candidates considered by Vice President and presidential nominee Hubert Humphrey to be the Democratic Party's nominee for Vice President of the United States in 1968; Humphrey chose Senator Edmund Muskie of Maine because of Harris's young age of 37. According to O'Brien, Humphrey vacillated between the two until finally choosing Muskie at the last minute. Harris broke with Johnson and Humphrey over the Vietnam War. In 1970, Harris was a major player in the successful legislation to restore to the inhabitants of the Taos Pueblo 48,000 ac (19,425 ha) of mountain land that had been taken by President Theodore Roosevelt and designated as the Carson National Forest early in the 20th century. The struggle was particularly emotive since this return of Taos land included Blue Lake, which the Pueblo consider sacred. To pass the bill, Harris forged a bipartisan alliance with President Richard Nixon, from whom Harris was sharply divided on numerous other issues, notably the Vietnam War. In doing so, he had to overcome powerful fellow Democratic Senators Clinton Presba Anderson and Henry M. Jackson, who firmly opposed returning the land. As recounted by Harris's wife, LaDonna, who was actively involved in the struggle, when the