Take Me to your Leader
The Democrats have the presidency and large majorities in both houses of Congress. One party having this level of control is not unheard of, but it certainly is not the norm historically.
The loss of a filibuster-proof majority is significant, but this supermajority only existed for about six months anyway, after Al Franken took his Senate seat in July.
When Obama ran his campaign, he was very clear about his priorities. In fact, much of his plan to help the economy included dealing with the long-term issues of health care, energy and education.
To summarize, Democrats won the presidency and increased their numbers in both houses of Congress after clearly telling us what their plans were. Then they started working on those plans, but found it hard to get agreement on the details. And now a large number of people are ready to dump the Dems before they even get a chance to put their plans in place.