Senate Immigration Bill Would Bring Millions Of Legal Immigrants to U.S. Workforce

The immigration bill would shift the emphasis of U.S. immigration policy away from family ties and put more weight on employment prospects, education and relative youth. It also would raise ceilings on how many immigrants could come from any one country.

"There's not going to be a dramatic change that we will see overnight, but longer-term changes," said Audrey Singer, a senior fellow at the Brookings Institution. "We've got this idea of the policy and then when we put it into practice inevitably there are unintended consequences or unintended trends that develop."