Barack Obama effectively used social media platforms like Facebook, Twitter, and YouTube to engage with supporters during his 2012 re-election campaign. On Facebook, Obama had over 12 million likes and his page kept supporters updated. His tweet announcing his re-election received over 500,000 retweets, making it the most retweeted post at that time. Obama's YouTube channel had over 261,000 subscribers and 2.62 billion video views, showing his success in reaching audiences on various social media platforms.