For the last decade the U.S. election system has been targeted relentlessly, by hostile nation-states. Russia, the principal culprit is at it again, with a new scheme so potent that even the US Congress was caught off guard. In this episode, Dr. Martin Innes, from Cardiff University in the UK talks about how Doppleganger works. Learn more about your ad choices. Visit podcastchoices.com/adchoices