A new American Research Group survey in Michigan shows Rick Santorum leading the GOP primary field with 33%, followed by Mitt Romney at 27%, Newt Gingrich at 21% and Ron Paul at 12%.
A Public Policy Polling survey finds Santorum with a huge lead over Romney, 39% to 24%, followed by Paul at 12% and Gingrich at 11%.
"Santorum's rise is attributable to two major factors: his own personal popularity (a stellar 67/23 favorability) and GOP voters increasingly souring on Gingrich. Santorum's becoming something closer and closer to a consensus conservative candidate as Gingrich bleeds support."