In reaction to the flood of new immigrants brought by the Hart–Celler Act, and increasing numbers of undocumented immigrants from Mexico and Latin America, Congress attempted to reverse the consequences of the 1965 legislation by enforcing border patrol, using amnesty for undocumented immigrants in the Immigration Reform and Control Act of 1986, and proposing limits to family reunification policies. The effects of ending the Bracero Program were increased undocumented Mexican migration because of the social capital gained during that period. Chain migration had provided relatively easy access to migration for Mexicans that the immigration legislation of the 1980s to the present has attempted to deal with.