CBS News @CBSNews
What began as a two-man race between Dr. Mehmet Oz and David McCormick for the GOP nomination for Pennsylvania Senate, has become a three-way contention as candidate Kathy Barnette surged in the polls. "It's a toss-up down to the wire," @costareports says on tonight's primary. https://t.co/jZdLOjiSyX — PolitiTweet.org