Russia hacked the 2016 US elections, getting Donald Trump elected in the process, giving us all headaches and the prospect of the USA being ruined. The NY Times and other news outlets have pushed this story from many angles. This particular article covers not the hacks on the election system, but the information warfare that preceeded the election, and has been aimed at other countries as well. It's been widely reported since 2014 at least that Russia-intelligence-service-connected-companies are operating "spam farms" that spew targeted content into social media networks, into blog comments, and into fake-news-blog websites. The purpose of these operations is to make the population believe fictions, and to act on those ficitious ideas.
For example a story surfaced in Germany a couple years ago that a young girl had been raped by Muslim refugees of the sort that have flooded into Germany thanks to the Syrian civil war. The police were covering up the crime, supposedly, for some unknown reason. RT News and Sputnik News acted as amplifiers to other social media postings and protest rallies. The thing is, there was no truth to the story. There had been a young girl arrested who initially told the story of being raped, but then she recanted that story to cover up the truth of some other event in her life. These Russia-connected organizations amplified the false story, and it became a large domestic issue spreading the idea that Merkel was dangerously accepting immigrants who were raping people right and left, and it even became a diplomatic issue between Russia and Germany. All over a piece of fake news amplified by actors connected to the Russian government.
This sort of misinformation can, and has, swayed recent elections. I have collected several news reports on this topic going back a few years at Russia's use of Social Media channels and the Internet in Government-Government warfare