It is fairly rare in American political history for any party to long maintain a super-majority above 60 seats in the Senate, so its a natural fear that they may lose some elections in the coming term.
Complicating this is the fact that the final healthcare bill was relatively unpopular by the time it had been compromised down to little more than a big corporate giveaway.
Unfortunately, a loss on this legislation would potentially be worse than a victory, so the partisan reps will continue to support it despite the damage that they’ll still receive for doing so.
Of course, any losses the Democrats suffer do not necessarily become gains for traditional Republicans. In many polls, voters would support “Tea Party” Republicans over GOP-insiders, but since the GOP controls the Tea Party PACs it probably doesn’t matter too much. Republicans who do get elected will probably run on a more populist platform than we’ve seen in the past, and many of them will set themselves up in opposition to both Obama and other aspects of Bush’s legacy.
Another source of danger for the Democratic super-majority is the rise of progressive parties and the general drift of those on the farther parts of the left who have so far been disappointed with Obama’s progress in changing or undoing many of Bush’s administrative trends.
In the coming years, voter dissatisfaction and Congress’s inability to please both sponsors and voters will lead us to a wild ride that re-aligns American political alliances for generations to come. Some of the players are starting to group up and get ready for the coming election rounds, but we probably won’t conclusively know what the new scene looks like for another six or eight years.