President Barack Obama reportedly told Russian President Vladimir Putin in October that directly interfering with the U.S. election could result in an "armed conflict." According to NBC News, Obama opted to use the red phone to contact Moscow directly, a communication system that dates back to the Cold War. It's not an actual telephone, but instead sends a secure email message between the two countries. "International law, including the law for armed conflict, applies to actions in cyberspace," part of the Oct. 31 message read, according to NBC. "We will hold Russia to those standards."