With a policy change, nearly 4 million undocumented immigrants could be authorized to work legally.

Key business and labor groups have agreed to a temporary worker plan that may result in political compromise. The deal hinges on paying a "prevailing wage."

Deferred Action allows the children of undocumented immigrants to work legally in the U.S., but only temporarily.

Select undocumented spouses of U.S. citizens could get hardship waivers allowing them to circumvent bureaucratic hurdles that can separate families for up to 10 years.