CBS News poll show even Democrats getting closer to the tipping point for opposing Obamacare, Obama's approval rate down to 37%

Republicans and Independents have long been strongly against Obamacare, but if even the majority of Democrats turn against it, can congressional Democrats really keep supporting it?  Obama's approval rating is now down solidly below 40 percent.  The fact that even support among Democrats is heading down to near 50 percent shows the problem that Obamacare is facing.  From CBS News:

Thirty-seven percent now approve of the job Mr. Obama is doing as president, down from 46 percent in October -- a nine point drop in just a month. Mr. Obama's disapproval rating is 57 percent -- the highest level for this president in CBS News Polls. . . . 

Republicans are nearly unanimous in their disapproval of the law, and now more than two-thirds of independents agree. Almost six in ten Democrats continue to support the law, but their support has dropped 16 points from last month - from 74 percent in October to 58 percent today. Support has dropped 11 points among independents and five points among Republicans. . . .