Republican U.S. Senate hopeful Dr. Mehmet Oz is responding to a tweet by his opponent. Earlier this week, Democratic Lieutenant Governor John Fetterman posted that it cost him over 100-dollars to fill up his vehicle. Dr. Oz responded by asking Fetterman why he would have to fill up, since he hasn’t been out campaigning. Fetterman hasn’t attended a public event since suffering a stroke days before the May primary.