While voters oppose the health care plan, they back two options cut from the Senate bill, supporting 56 - 38 percent giving people the option of coverage by a government health insurance plan and backing 64 - 30 percent allowing younger people to buy into Medicare.

Ipsos, however, did something that no other pollster has done. They asked the people who opposed the bill why they opposed it: because they are opposed to health care reform and thought the bill went too far? Or because they support health care reform but thought the bill didn't go far enough?

It turns out that a significant minority of about 25 percent of the people who opposed the plan -- or about 12 of the overall sample -- did so from the left; they thought the plan didn't go far enough.

Ipsos also asked a parallel question of people who supported the plan: did any of them support the plan because they oppose health care reform and thought that the plan was sufficiently watered-down so as to "keep health care reform from happening"? A small number of people picked this response: about 10 percent of those in favor of the plan, or 3 percent of the entire sample.

One way to look at this: 43 percent of people favor health care reform, whereas 38 percent oppose it (20 percent are undecided). But the actual plan under consideration gets numbers that are more or less the reverse of that -- 34 percent in favor, 46 percent opposed -- because a significant number of people think the plan doesn't go far enough.