A new Washington Post-ABC News poll showed Rick Santorum having 66 percent favorability rating among Republican and Republican-leaning women, the highest of the GOP presidential candidates. But the problem for Santorum and the other candidates is that they don't do well with women overall, according to a recent Wall Street Journal/NBC News poll. A hypothetical contest between President Obama and Santorum found the president winning among women by 24 percentage points. Against Mitt Romney, Obama won by 18 points among women. The gender gap is particularly a problem for Republicans because women tend to vote in higher numbers than men.