Rick Santorum's 15-point lead shrinks to 4
(Newser) -
Last week, Rick Santorum led Mitt Romney in the Michigan race by 15 points ; now, that lead is down to just four points, Public Policy Polling finds. Some 37% of voters say they support Santorum, compared to 33% for Romney; Ron Paul follows with 15%, while Newt Gingrich stands at...