A national poll conducted for Time on Oct. 9 and 10 found that if Clinton were the Democratic nominee for President in 2012, she would best Mitt Romney 55% to 38%, Rick Perry 58% to 32% and Herman Cain 56% to 34% among likely voters in a general election.
The same poll found that President Obama would edge Romney by just 46% to 43%, Perry by 50% to 38% and Cain by 49% to 37% among likely voters.
http://www.mediabistro.com/fishbowlny/time-takes-on-hillary-clinton_b45755Of course the numbers would be reversed if it were the other way round - Obama being the SoS and Hillary the POTUS ...