In it, but not of it. TPM DC

This Poll Shows Exactly Why The GOP Has To Keep Hating Obamacare

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AP Photo / Charles Dharapak

It fits with previous public polling as well as the perception of the national landscape from Democratic strategists: Republicans can't abandon Obamacare entirely because it motivates the base unlike any other issue. And it appears that the conservative echo chamber remains convinced of the law's failure -- despite the indications to the contrary.

And if the law's best month of news since its passage isn't going to change Republican minds, it seems nothing will before November 2014. So the GOP will likely keep singing the same song.

The new WashPost-ABC News poll found that 68 percent of Republicans said that Obamacare's rollout has gone worse than they expected -- suggesting that, at least for now, the facts on the ground aren't going to change their view of the law.

Republicans were also more likely to say that they were absolutely certain to vote: 78 percent, compared to 72 percent of Democrats. So while Democrats hold a slight edge, 45 percent to 44 percent, on the generic congressional ballot among all registered voters, Republicans possess a more substantial advantage with absolutely certain voters: 49 percent to 44 percent.

That's the enthusiasm gap -- something of a cliche at this point, but nevertheless borne out in polling -- that Democrats have to overcome this fall.

The poll, conducted April 24 to 27, surveyed 1,000 U.S. adults. Its overall margin of error is 3.5 percentage points.