TV icon Oprah Winfrey on Thursday endorsed Democrat John Fetterman in Pennsylvania's hotly contested Senate race and rejected Republican Dr. Mehmet Oz, whom she had helped launch to stardom nearly two decades ago when she brought him on her popular daytime talk show as a regular guest. Subscribe to WCVB on YouTube now for more: http://bit.ly/1e8lAMZ Get more Boston news: http://www.wcvb.com Like us: https://www.facebook.com/wcvb5 Follow us: https://twitter.com/WCVB Instagram: https://www.instagram.com/wcvb5/