Democratic firm Public Policy Polling released today their match-up of the top GOP contenders with President Obama in a general election. Mitt Romney would tie with President Obama, 45 percent to 45 percent. The other GOP candidates would lose: Rick Perry is 43 percent to Obama’s 49 percent, Bachmann 42 percent to 50 percent, Herman Cain 39 percent to 49 percent, and Sarah Palin 40 percent to 53 percent.