When the president took office the labor participation rate was 65.7 percent, 3 percentage points higher than it was in September. Had September's labor participation rate been 65.7 percent, the unemployment rate would have been 10.2 percent, or 2.4 percentage points higher than when President Obama took office...
When President Obama took office, the unemployment rate for 25- to 54-year-olds was 7.2 percent. By September of this year, it had declined to 5.4 percent. Sounds good. However, if the labor- participation rate had remained at 82.8 percent as it was when President Obama took office, September's unemployment rate would have been 7.3 percent. This is 0.1 of a percentage point higher than when President Obama took office, again demonstrating that the improvement in the unemployment rate for prime working age Americans was due entirely to a decline in labor participation...
http://www.cnbc.com/id/102077550