FILE - In this Aug. 23, 2011 file photo, Sen. Marco Rubio, R-Fla. speaks in Simi Valley, Calif. Rubio's push for a Republican version of immigration legislation could be the answer to GOP election-year prayers. The telegenic son of Cuban exiles and potential vice presidential pick is putting together a bill that would allow young illegal immigrants to study and work in the United States but still deny them citizenship. (AP Photo/Jae C. Hong, File)
FILE - In this Aug. 23, 2011 file photo, Sen. Marco Rubio, R-Fla. speaks in Simi Valley, Calif. Rubio's push for a Republican version of immigration legislation could be the answer to GOP election-year prayers. The telegenic son of Cuban exiles and potential vice presidential pick is putting together a bill that would allow young illegal immigrants to study and work in the United States but still deny them citizenship. (AP Photo/Jae C. Hong, File)
The Florida senator and possible 2016 Republican presidential contender also says Congress should establish an independent accrediting agency to assess free courses offered over the Internet and elsewhere as transferrable credits. (AP)