@H2O MAN,
Yes, because I don't think he will win unless he can drastically change the minds of an electorate that seems to be a bit disillusioned with his hope and change.
Of course, that does not mean the republican candidate would be any better and I guess the repubs could put up someone who would make Obama look good, but I'd be willing to take that chance and see Obama run.
Unless public opinion sways the other direction in the next year, I think even some dems will urge him (privately) not to run.