The way I see it, approval for this bill is going to be won on the basis of headlines. If there are lots of headlines about new consumer protections, coverage going up, new community health centers being built, etc., then people are going to think the venture is a good idea. If there are lots of stories about benefit cuts and the like, the opposite will occur. Democrats obviously think the former will outweigh the latter in time, and I do suppose it will. But in the here and now, this pretty much explains it. Of course, I'd feel a lot better if the Dems had someone manning the press shop that was actually good at getting messages into media coverage like Howard Wolfson, instead of Robert Gibbs.
By the way, I'm not ever sure if Gingrich is telling the truth or bullshitting, and it's especially unclear here. That he thinks that this polling dip is due to the public finding out more about the bill is pretty hard to believe. The round of coverage after the bill passed that focused on the benefits of the bill, and the polling went up. Then there was coverage of these write-offs, and the polling went down. The next round might well be positive, and the polls will go up. Gingrich isn't much of a politician, but rather a great self-promoter. That he is becoming a more plausible presidential candidate by the day is...interesting.