Immigration overhaul legislation by the so-called "Gang of Eight" senators could be unveiled as early as Tuesday.
The measure provides 11 million illegal immigrants with a 13-year path to citizenship. Undocumented workers would have to pay thousands of dollars in fines to earn legal status.
Republican Sen. Marco Rubio says a new deal on immigration does not include any kind of amnesty provision.
The Florida lawmaker is one of the senators working on the bipartisan legislation. He said the new immigration plan just offers another option to what's currently available.
"All we've done here is create an alternative to that, that they can access," Rubio said. "And the alternative we've created is going to be longer, more expensive, and more difficult to navigate."
"It would actually be cheaper if they went back home, waited 10 years and applied for a Green Card," he explained.
"And, and so, secondly we're not awarding anything," he added. "All we're giving people (is) the opportunity to eventually do -- is gain access to the same legal immigration system, the same legal immigration process, that would be available to everybody else."
Nonetheless, a number of Republicans including Sen. Jeff Sessions of Alabama say the plan effectively offers amnesty, and they won't support the measure.