NEW : Mitt Romney warns that liberal elitism threatens the United States . I just am who I am , '' Rick Santorum gets a key endorsement from Michigan 's conservative governor . Rick Santorum appears to downplay his chances in This Week 's Arizona primary . The outcome of the Michigan primary will significantly impact the American race .
NEW : Mitt Romney warns that liberal elitism threatens the United States . Rick Santorum gets a key endorsement from Michigan 's conservative governor . Rick Santorum appears to downplay his chances in This Week 's Arizona primary . The outcome of the Michigan primary will significantly impact the American race .