Shortly before midnight on Tuesday night, Barack Obama sent out this tweet. Since then, it has been retweeted almost 800,000 times and is on pace for 1,000,000 retweets. It’s the most retweeted tweet of all time:

Four more years. twitter.com/BarackObama/st…

— Barack Obama (@BarackObama) November 7, 2012

Megan Garber at The Atlantic puts Obama’s tweet in perspective with other most retweeted tweets in Twitter’s history.