Based on the average of polls on the generic Congressional vote (Democrat vs Republican) calculated by Real Clear Politics (a conservative site) and Pollster.com (a liberal site) and using my forecast model it is appears that the Democrats will take firm control of the U.S. House of Representatives on Tuesday, picking up from 40 to 45 congressional districts. They need win only 15 to assume control.
I should note that this is a higher number than most forecasts. Two of the most widely read and respected are the Rothenberg Political Report, which predicts Democrats will gain 35 to 40 with the possibility of a few more, and the Cook Political Report, which predicts gains of 20 to 35 with the possibility of more.
The movement towards the Democrats started in September around the time of the release of Bob Woodward's book. Although most voters would not have read the book, the simple, clear message that the Bush administration was unbelievably incompetent was repeated by Mr. Woodward on endless talk shows such as Larry King. It clearly registered.
Control of the Senate is unclear and depends on several close races, but it is clearly possible for the Democrats to win the Senate as well. If all of the Senate were facing re-election instead of a third, Democratic control would be certain.