"This whole issue is not about me," Reid said in his home state of Nevada on Monday. "Mitt Romney's the first presidential candidate since his dad ran not to release his income tax returns. He's released one income tax return, and that points toward the Bahamas, Switzerland and a few other foreign countries. This whole controversy will end very quickly if he releases his income tax returns, like everybody else has done."

Romney has released his tax return from 2010 and an estimate from 2011. He has vowed to release his full 2011 return once it's completed, but he will not release past years', as previous presidential candidates have done.