ABC/WaPo poll: Cain ties Perry

This week's ABC/Washington Post poll shows Mitt Romney in the lead, but Rick Perry falling off dramatically, while Herman Cain has surged into a tie for second:

Romney 21%
Cain 14%
Perry 14%
Christie 10%
Palin 9%
Paul 9%
Gingrich 6%
Bachmann 4%
Huntsman 1%
Santorum 1%

The standings among the declared candidates:

Romney 25%
Cain 16%
Perry 16%
Paul 11%
Gingrich 7%
Bachmann 7%
Santorum 2%
Huntsman 1%