Just moments after the U.S. networks projected an Obama win, the President’s Twitter account posted a photo of Michelle Obama embracing her husband, with a simple message: “Four more years”.

Within an hour that tweet was being discussed as the most popular tweet of all time, garnering more than 300,000 retweets.

Social media literally heaved under the weight of millions of people taking to Twitter, Facebook, YouTube and countless other platforms to share their view.