Edited sentence: , and as a threat to the ability of labor unions to organize workplaces, with the threat always present that if workers organize they can easily be replaced by cheaper legal or illegal labor.946 The Mass Immigration Reduction Act of 2003 (The Tancredo bill).Although various factors impact housing prices, high population growth conflicts with goals for "affordable housing.Americans for Better Immigration.Center for Immigration Studies.Commission on Immigration Reform (the Jordan Commission).Continued strong population growth through immigration drives up demand for housing.Diversity Alliance for a Sustainable America.EcoFuture (TM) Population and Sustainability.Federation for American Immigration Reform.High levels of immigration may be seen as providing a steady source of cheap or low-wage labor to corporations.Illegal immigration is often seen as symptomatic of widespread lawbreaking by employers, who hire workers illegally in the country in order to escape wage, workplace safety, and labor laws.Mass immigration has long been blamed for interfering with the employment of African-Americans and other minorities.Overpopulation and other environmental issues.Population Stabilization.Proposal To Address Illegal Immigration From Mexico.Reasons for favoring immigration reduction given by supporters include:.Selected immigration reduction links:.Some believe the high levels of immigration into the US, whether legal or illegal, are at rates too high to allow recent immigrants to assimilate into US culture and discourages recent immigrants from learning the English language.Southern Poverty Law Center.Support U.Supporters and critics of the movement debate over whether these workers could easily be replaced by legal workers being paid in accordance with wage laws.Temporary work visas are often used to replace high-wage workers in industries such as computer programming, biotechnology and engineering with lower-wage workers imported from other countries.The overall erosion of wages has been claimed to have resulted in many fewer Americans opting to pursue scientific majors in college and careers, and an overall decrease in the scientific ability of America's citizenry.This can be seen as detrimental to wage levels in the U.This is especially a problem in the agriculture sector, where it is estimated that over 80% of workers are in the country illegally.This is seen by many as closely related to the practices of outsourcing and offshoring of jobs