Visualization of the spread through social media of an article falsely claiming 3 million illegal immigrants voted in the 2016 presidential election.

Shortly after the 2016 election, newly elected President Donald Trump—peeved at losing the popular vote to Democratic opponent Hillary Clinton—falsely claimed he would have won the popular vote if not for the supposed votes of 3 million illegal immigrants. The lie spread rapidly across social media—far faster than factual attempts to debunk it. And Twitter bots played a disproportionate role in spreading that false information.

https://arstechnica.com/science/2018/11/study-it-only-takes-a-few-seconds-for-bots-to-spread-misinformation/