In 2006' the democrats took control of the US Congress in both houses and since then have also to my knowledge at the least won about all (if not all) special elections to fill vacant seats. Most pundits believe the democrat party will pick up even more seats in the coming elections and several longstanding, high ranking republicans in the congress are leaving out of this accepted belief.
That said, in the chart below I just want to point out the graph from 2006' to the present in which time (OK, really from Jan. 07) the democrats controlled the congress and where according to the Constitution, where all bills of spending must originate which is the House. For a party that is suppose to end the Iraq war and bring "PEACE IN OUR TIME" they sure don't prove it when you look at the facts!
source for chart above:http://www.lewrockwell.com/orig9/quinn2.html
Article at link is written by Jim Quinn, Senior Director of Strategic Planning, The Wharton School, University of Pennsylvania.