A poll released Monday suggests a tight race in Pennsylvania's GOP Senate primary between Mehmet Oz, David McCormick and Kathy Barnette. (May 12) Subscribe for more Breaking News: http://smarturl.it/AssociatedPress Website: https://apnews.com Twitter: https://twitter.com/AP Facebook: https://facebook.com/APNews Instagram: https://www.instagram.com/APNews/ ​ You can license this story through AP Archive: http://www.aparchive.com/metadata/youtube/310e59cb6ca44f34a3c765da01ab7e6f