@Cycloptichorn,
I agree recent forecasts suggest the Democrats will hold on to the House by a slim margin. However, recent trends have been generally against Democrats, and I suspect the President's credibility is fading fast among all but his zealous committed supporters. A lot can change between now and November (just four months to go) and recent trends are unfavorable for the current Congress and the Administration.
I don't favor impeachment. However the President has demonstrated a potentially dangerous authoritarian streak - unilaterally deciding which laws to enforce and which to ignore; demonizing businesses and calling for ever more government control of economic activity (even as the government continues to demonstrate its ineptitude); and lecturing the people on how we should live.
All of this is further jeapordized by the repeatedly demonstrated combination of incompetence, authoritarianism and evasions of responsibility or blame by the President and his appointees. From the chaos surrounding scheduled terrorist trials; to Congressionsl dealmaking to pass legislation; blatant payoffs to unions that defy the public interest; and the current sorry spectacle of the response to the Gulf Oil catastrophe they have presented us with a very sorry spectacle of hypocrisy and amateurism, all made worse by their penchant for authoritarianism and excuse-making.
All things considered, I suspect the Obama presidency will be ranked somewhere below that of Jimmy Carter.