What impact will immigration have on the U.S.?

By 2050, the number of immigrants in the U.S. is expected to surge past 142 million. Given the implications, Jan C. Ting, a professor at Temple's Beasley School of Law, wonders why politicians have reached a stalemate in the immigration debate. "Too many of our politicians of both political parties don't really want to enforce an immigration cap, but they're equally unwilling to abolish one," he wrote in an opinion piece. "The failure to enforce our existing immigration limit encourages more violators, aggravating the problem and generating high costs of services to illegal entrants for public health, education and law enforcement."
March 27, 2011 | Philadelphia Inquirer