The Center for Immigration Studies is an independent, non-partisan, non-profit research organization founded in 1985. It is the nation's only think tank Comparison of estimates for the number of people in violation of US immigration law. Facts, Figures and Statistics Show the Costs and A Dark Side To Illegal Immigration Immigration ProCon.org is a nonpartisan, nonprofit website that presents research, studies, and pro and con statements on questions related to illegal immigration in. Illegal immigration to the United States is the act by foreign nationals violating United States immigration laws by either entering the country without government. It is time to End Illegal Immigration. Stop the Amnesty and Guest worker Programs. Stop Illegal Immigration. Now is the time to End Illegal immigration. Illegal immigrants are a convenient scapegoat for our economic crisis. But with free markets and private property, the need for immigrant labor becomes obvious. ILLEGAL IMMIGRATION: COSTS, CRIMES, & RELATED PROBLEMS (U.S.) Illegal immigration imposes enormous costs -- monetary as well as crime-related -- on American society. ALIPAC's Activism Alerts and Press releases about illegal immigration, illegal immigrants, amnesty, immigration laws, and other immigration related topics. Illegal immigration is the migration of people across national borders in a way that violates the immigration laws of the destination country. Some countries have.