...a pair of polls...ought to be scaring the pants off of Romney’s camp. A PPP Michigan poll shows Santorum leading...by a 39-24 percent margin. The ARG poll also has him ahead, though by a smaller 33-27 percent differential. ...if any in his campaign were inclined to dismiss Santorum’s surge...this poll is proof they are dead wrong...a loss in Michigan would be fatal to [Romney's] presidential hopes...the air would go out of his inevitability balloon and Santorum would, despite his threadbare national campaign, assume the unlikely role of frontrunner. ...a defeat [in Michigan] would be considered a personal repudiation of [Romney's]...