The House
At MyDD, poll collector Chris Bowers shows that there are enough Dems in the lead right now to take over the House, if current numbers hold up.

Overall, Democrats lead in twenty congressional districts. One district is tied, and Democrats are within striking distance in at least thirteen more. I did not even include polls here form KS-02 and ID-01, both of which show Democrats winning, because I am highly suspicious of both polls. TX-22, a sure Democratic pickup, was also not included because no polls have been released for the district. There are also several more Republican held seats not shown here that have shown strong signs of competitiveness

We need to gain 15 to take control.