Rick Perry’s energy has been known to flag on the campaign trail, but he was plenty fired up this morning. Visiting with volunteers in west Des Moines, the Texas governor gave 'em their marching orders—quite literally—for caucus day: “This is Concord,” he declared. “This is Omaha Beach. This is going up the hill, realizing that the battle is worthy. This is about sacrifice. Every man and woman has sacrificed your time, your treasure, your reputation."