Before sending it to the United States Senate, Clinton added two side agreements, the North American Agreement on Labor Cooperation (NAALC) and the North American Agreement on Environmental Cooperation (NAAEC), to protect workers and the environment, and to also allay the concerns of many House members. The U.S. required its partners to adhere to environmental practices and regulations similar to its own. After much consideration and emotional discussion, the U.S. House of Representatives passed the North American Free Trade Agreement Implementation Act on November 17, 1993, 234–200. The agreement's supporters included 132 Republicans and 102 Democrats. The bill passed the Senate on November 20, 1993, 61–38. Senate supporters were 34 Republicans and 27 Democrats. Republican Representative David Dreier of California, a strong proponent of NAFTA since the Reagan Administration, played a leading role in mobilizing support for the agreement among Republicans in Congress and across the country.