The Hill writes, "A majority of voters in key battleground districts favor repeal of the legislative overhaul Congress passed this year." A newly released survey that The Hill conducted of nearly 5,000 likely voters in twelve hotly contested congressional districts finds that 56 percent, including almost one in four Democrats, want Obamacare to be repealed. Moreover, The Hill writes, "In each district, a majority of those surveyed said they want the controversial law gone," and "[o]f the 12 districts polled, only one fell within the margin of error on repeal."
Chief pollster Mark Penn said, “I was most surprised at the strong discontent with [the] healthcare [overhaul]. I thought that there was continued discontent but that it had moderated from what we’re seeing in these districts.” Instead, Penn noted, “Most people actually favor repeal of the healthcare legislation, and that included 54 percent of the independents." Even undecided voters aren't undecided about Obamacare: Penn observed, "Undecided voters wanted the healthcare law repealed by 49 percent to 27 percent.”
Jay Cost provides further analysis of this poll here.