What are the percentages of registered voters by political party in the US?

As of 2011, Gallup polling found that 31% of Americans identified as Democrats (tying a 23-year low), 27% as Republicans, and 40% as independents (largest in 60 years). Nevertheless, since more independents leaned to the Republicans, when including the leaners, the democrats and republicans ended up tied at 45 percent (from wikipedia)