Senate Majority Leader Mitch McConnell on Monday warned against foreign interference in U.S. elections, threatening that nations seeking to meddle in the 2020 races will “have a serious problem” on their hands.

“Look, 2018 was a big success story,” the Kentucky Republican told CNBC, praising the Trump administration’s efforts to safeguard last year’s midterm elections.


“I’m convinced we're ready for 2020,” he continued. “Any foreign country that messes with us is going to have a serious problem in return.”