Democrats and unemployment

I just reviewed historical unemployment data, courtesy of the U.S. Bureau of Labor Statistics, and noticed a few things:
* Unemployment has doubled since Democrats took over congress in 2007, with more than 6,000,000 jobs being lost in that same period.
* The highest unemployment rate under the Republican congress from 1994 to 2006 was 6.6 percent; with Democrats in congress, it currently stands at 9.5% and is expected to continue to increase throughout the rest of the year.
* Unemployment has increased by 25 percent since Democrats increased their congressional majority in January 2009.

Is there a direct correlation? The numbers speak for themselves.