If you read about the Russia investigation long enough, it is inevitable that before long you're going to come across a comparison to Watergate.But for those of us who didn't live through the Watergate scandal, or didn't follow it closely at the time, it can be difficult to fully understand.In today's episode, we're taking a look back at the biggest political scandal of 20th Century America, and how it compares to the Russia investigation.Want to get in touch? Email: russia@abc.net.au.