WASHINGTON - U.S. Director of National Intelligence Dan Coats said on Tuesday he had not seen evidence of "robust effort" by Russia to meddle in the 2018 U.S. election, but it is "highly likely" Moscow will try to do so."We have not seen evidence of a robust effort yet on the part of Russia, but we know their malign activities continue to exist," Coats told a Senate Armed Services hearing on "Worldwide Threats.""It's highly likely that they will be doing something. We just don't know how much and when and where," he said. Russia has denied any such efforts.