Currently 42% of the American public identifies as tea party. Even if tea party republicans cannot control the liberal government, that large a percentage can make the nation ungovernable.
Like it or not, democrats HAVE to have the cooperation of republicans on every level. They cannot govern the nation without it. What democrats can do is to become increasingly tyrannical with what power they have. That will become a point of diminishing returns real fast.
42% Identify with Obama Politically, 42% with the Tea Party - Rasmussen Reports?
The willingness to engage in that kind of tyranical control is becoming more apparent. obamacare is rejected. Doctors refuse to participate in the program. The democrat answer is to FORCE doctors to participate in the government program. The entire system of governance is based on force. This is the end of liberal governments. No one nation can provide a lazy population with everything they want.