Immigrants come to the US because their economic and political conditions push them to leave home. What pulls them to the US are employers seeking workers who will accept lower than average US wages. Higher profits flow to employers of immigrants (and even higher for employers of undocumented immigrants afraid to demand their legal rights). Yes, immigrants lower wage levels, but they also buy m,any products and thus support jobs for non-immigrants in the US; they pay taxes that support government services for everyone; they add immeasurably to US culture. No one knows or can measure all the consequences of immigration to get a "net" result. Employers' demands for immigrants have kept up the flow despite decades of border patrols, fines, fences, and laws. Best response to immigration would be for US unions and others to organize immigrant workers as fast as possible to demand and obtain similar wages and working conditions as non-immigrant laborers.