A lot of people believe the re-emergence of the GOP in the House is a sign of Obama's failure. I'm not sure that's entirely true. Seems to me more of a Pelosi failure. She never rallied her troops, took no leadership when others were calling for Bush's impeachment, failed to stand up for Obama's HCR efforts, and never countered the barrage of propaganda from the far right in re to the deficit and recession inherited from Bush which is being falsely attributed to Obama.
Obama made a critical error - He believed that the US Voter gave him a ringing endorsement to enact radical change - many Independents voted for Obama same as many moderate repubs because they were fed up to th hilt with Bush/Cheney. He was riding on his own speeches which as I have stated for quite some time were all feel good. The US Voter was looking for the beef after he was elected.
Next one was Obama Care - Set that aside and get the economy going - A recall an election phrase from 92, I believe it was from the Clinton campaign - Its the economy Stupid. Obama dropped that ball.
Just to name 2 critical and strategic errors -
Blaming the Wicked With of San Francisco does not cut it - She was not president.