If you read any account of the history of the KGB and GRU (obviously the west does it too), so-called Active Measures are their bread and butter. It would be bizarre if they weren't trying to influence countries via social media

I believe that social media is being used to try to influence American elections, whether it actually being influenced is unclear, and I believe overblown. I've been party to enough multi million dollar brand campaigns to know the results are hard to measure, often less than believed, and generally a waste.