Zogby: Herman Cain Leads GOP Field With 28%

Herman Cain 28%, Rick Perry 18%, Mitt Romney 17%. A CNN poll released this morning had Perry leading and Herman Cain only pulling 7%

UTICA, NY--Rick Perry has tumbled by more than 20 percentage points over the past month among Republican presidential primary voters and is now second to Herman Cain, who leads the field with 28%.

Mitt Romney received little benefit from Perrys fall, garnering 17% of the vote for third place

As for President Barack Obama, both his job approval (42%) and the percentage who believe he deserves re-election (37%) are little changed from recent polls, but he does seem to be winning back some supporters who have been disappointed in his job performance.

These results are from an IBOPE Zogby interactive poll conducted Sept. 23-26 of all likely voters and of likely Republican primary voters.

Here's how Zogby/IBOPE has it