From Rasmussen Reports:

The Rasmussen Reports daily Presidential Tracking Poll for Saturday shows that 30% of the nation's voters Strongly Approve of the way that Barack Obama is performing his role as President. Thirty-eight percent (38%) Strongly Disapprove giving Obama a Presidential Approval Index rating of -8.

Overall, 50% of voters say they at least somewhat approve of the President's performance. Forty-nine percent (49%) now disapprove. Starting today, a new graphic has been added to this page highlighting the President’s overall levels of approval.

The Presidential Approval Index is calculated by subtracting the number who Strongly Disapprove from the number who Strongly Approve.

For more polling numbers check out Rasmussen Reports