polls show that town-hall attacks aren't working

From Nate Silver at 538:

Polls of this nature, however, are notoriously slippery. If there were some protest in favor of a policy that I supported -- like expanded stem-cell research -- I'd probably tell a pollster that the protest had in fact made me more sympathetic to the cause, even though my mind on the issue was already 100 percent made up and was not going to be swayed. The real question, then, is how many minds are being changed on the issue. And it may not be all that many. Three relevant polls have come out on this subject in August: a Rasmussen poll found some further erosion in support for the bills pending before Congress, but a Gallup poll did not find any further decline in Obama's approval on health care since mid-July. Nor did a CNN poll find any decline in support for the Democrats' health package, although that poll is now about a week old...


In other words, the only pollster who reporting any erosion is support is Rasmussen, who has already been caught many times stacking the deck in favor of the Republicans.