[337] These reforms later became law through the Immigration and Nationality Act of 1965, which dramatically shifted the source of immigration from Northern and Western European countries towards immigration from Latin America and Asia. The policy change also shifted the emphasis on the selection of immigrants in favor of family reunification. The late president's brother, Senator Edward Kennedy of Massachusetts helped steer the legislation through the Senate.[338]

Native American relations
Further information: Kinzua Dam § Native Americans, and Seneca nation § Kinzua Dam
Construction of the Kinzua Dam flooded 10,000 acres (4,000 hectares) of Seneca nation land that they had occupied under the Treaty of 1794, and forced 600 Seneca to relocate to Salamanca, New York. Kennedy was asked by the American Civil Liberties Union to intervene and to halt the project, but he declined, citing a critical need for flood control. He expressed concern about the plight of the Seneca and directed government agencies to assist in obtaining more land, damages, and assistance to help mitigate their displacement.