The 90th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from January 3, 1967, to January 3, 1969, during the last two years of President Lyndon B. Johnson's second term in office. The apportionment of seats in this House of Representatives was based on the 1960 United States census. Both chambers had a Democratic majority - maintaining a supermajority in the Senate, but losing seats in the House, costing them supermajority status in that chamber. Along with President Johnson, the Democrats maintained an overall federal government trifecta. Major events Major legislation April 4, 1967: Supplemental Defense Appropriations Act, , November 7, 1967: Public Broadcasting Act, , December 14, 1967: Uniform Congressional District Act, , December 15, 1967: Age Discrimination in Employment Act, , December 18, 1967: National Park Foundation Act, , January 2, 1968: Elementary and Secondary Education Amendments of 1967, , including Title VII: Bilingual Education Act, March 1, 1968: Fire Research and Safety Act of 1968, , April 11, 1968: Civil Rights Act of 1968, , , including Title II: Indian Civil Rights Act, May 29, 1968: Truth in Lending Act, June 19, 1968: Omnibus Crime Control and Safe Streets Act of 1968, , July 21, 1968: Aircraft Noise Abatement Act, , October 2, 1968: Wild and Scenic Rivers Act, , October 2, 1968: National Trails System Act, , October 15, 1968: Health Services and Facilities Amendments of 1968, , , including Title III: Alcoholic and Narcotic Addict Rehabilitation Amendments of 1968 October 18, 1968: Radiation Control for Health and Safety Act of 1968, , October 22, 1968: Foreign Military Sales Act of 1968, , October 22, 1968: Gun Control Act of 1968, , Constitutional amendments February 10, 1967: Twenty-fifth Amendment to the United States Constitution was ratified by the requisite number of states (then 38) to become part of the Constitution Party summary The count below identifies party affiliations at the beginning of the first session of this Congress, and includes members from vacancies and newly admitted states, when they were first seated. Changes resulting from subsequent replacements are shown below in the "Changes in membership" section. Senate House of Representatives Leadership Senate President: Hubert Humphrey (D) President pro tempore: Carl Hayden (D) Permanent Acting President pro tempore: Lee Metcalf (D)