I don't know if I can buy this poll, but if it is true then this is hilarious.
I buy it.
The poll shows only about 2/3 of democrats say they prefer Obama to be the party's nominee. The remainder (who make up about 13% of the poll respondents) are disaffected Dems, many of whom probably picked "somewhat disapprove" of Obama. Yet when it comes to a choice between Obama and a Republican candidate, these disaffected Dems will still pick Obama.
Interesting to see that Congress' approval number is only 9%!