Ann Arbor resident Pat Horton volunteers at a Step It Up rally station on Saturday to encourage people to sign an online petition urging Al Gore to run for president. Angela Cesere (JENNIFER KRON/Daily) Related articlesThe inherent, unrelenting work ethic spurring Blake Corum’s stardomMichigan leans on Corum, crushes Nebraska, 34-3‘The Last of Us’ concludes its first season the way it started: Wonderfully