Immigration in the US

The United States began as a country of immigrants. For more than a century, though, descendents of those immigrants have argued over exactly who should be allowed to enter the United States and become American citizens. Federal laws controlling the number of immigrants allowed into the country—along with limits on how many can travel here for specific reasons—have been passed, and abolished. State laws designed to identify illegal immigrants have been passed, and in some cases also retracted. Today immigrants contribute to the combined cultures that have always made up our nation. Still, foreigners are blamed for taking advantage of public service programs, taking Americans' jobs, and not paying taxes. Are these allegations true? What does the future hold for immigration in the United States?