Ohio will once again be a stumping ground this week for the nation's Presidential candidates. John McCain and running mate Sarah Palin are expected to visit Lebanon in southwest Ohio for a rally Tuesday. Also, Presidential nominee Barack Obama announced today he will also be in Ohio Tuesday, with a rally at a high school in suburban Dayton. Obama's wife, Michelle, is expected to speak Wednesday at a church in Cincinnati. Both McCain and Obama were in the state campaigning last week as well. Both candidates are considering Ohio a critical state in the November election.