Sen. Bob Casey Jr. (D-Pa.) on Sunday warned special counsel Robert Mueller against issuing a report on his findings in the ongoing investigation of Russian interference in the 2016 election near the upcoming 2018 midterm elections. "I don't think we'll know anywhere near the full story until [Mueller] issues his report," Casey said. "But once you get into the summer, and you get close to the election, I think it's a mistake for him to release it late. I think you should wait until after [the election]" Casey said.