The U.S. already has several temporary worker programs, but they don't work well and experts say a large proportion of migrant workers in agricultural and other low-skill fields like landscaping or housekeeping are in the U.S. illegally.
Associated Press writers Nedra Pickler and Darlene Superville contributed to this report.
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.