Data compiled by Sentier Research found that since the economic recovery technically began in June 2009, median household income has dropped 5.7 percent. As of August, that median income was $50,678 -- also down 1.1 percent from the month prior.

And since Obama took office in January 2009, the median income has fallen 8.2 percent, from $55,198 to its present figure.

"The August decline in real median annual household income is indicative of a struggling economy," Sentier said in its report.

"Even though we are technically in an economic recovery, real median annual household income is having a difficult time maintaining its present level, much less 'recovering.'"

The figures continue to paint a dim portrait of the nation's post-recession economic rebound, and are sure to factor into the robust economic debate on the campaign trail...