FILE - In this Sept 23, 2011 file photo, Libertarian Party presidential candidate, former New Mexico Gov. Gary Johnson speaks in Orlando, Fla. President Barack Obama's presidential cam

 

              FILE - In this Sept 23, 2011 file photo, Libertarian Party presidential candidate, former New Mexico Gov.  Gary Johnson speaks in Orlando, Fla. President Barack Obama
FILE - In this Sept 23, 2011 file photo, Libertarian Party presidential candidate, former New Mexico Gov. Gary Johnson speaks in Orlando, Fla. President Barack Obama's presidential campaign is paying close attention to two candidates mounting third party campaigns for the presidency, believing they could draw votes from rival Mitt Romney and help the president to victory in a few tightly contested states. (AP Photo/Joe Burbank, Pool, File)