Pres. Bill Clinton was able to convince the US Congress to pass the North American Free Trade Agreement through his persuasive and bargaining skills. His efforts, which were concentrated on undecided lawmakers, were complemented by efforts from allies that included economists, Nobel Prize winners, governors and foreign policy experts. Together, they were able to stem massive opposition to the bill from organized labor, consumer groups, environmentalists and African-American leaders. He was also able to modify the bill to be acceptable to more lawmakers.