Approve of his policies/disapprove of his performance: not a paradox

Greg Sargent wrestles with an apparent paradox in poll data: voters strongly approve of Obama's economic policies but disapprove of his handling of the economy to date. Methinks his explanation misses something rather basic:

What we’re seeing here, again, is more evidence that Republicans benefit from blocking policies Americans support. As long as the economy remains abysmal, the public is likely to strongly disapprove of Obama’s overall performance, even if Republicans are the ones blocking job-creation ideas the public itself thinks will reduce unemployment.

Sargent assumes that voters are judging Obama solely on the basis of whether they agree with his current preferred policies, and that many of them are being duped: they like the policies individually, but buy a Republican branding of the whole package.  That's probably true in some cases. But I suspect that a lot of people are judging Obama not for advocating the wrong policies but for failing to put his policies across.