Honestly, I can't believe it has been going on for so long as a major development in american media and politics.....
You're right about USA's history in meddling with other countries politics.
Though in regards to what Russia did in 2016, there is the DNC hack, and this came up a few days ago: https://www.nbcnews.com/politics/elections/russians-penetrated-u-s-voter-systems-says-top-u-s-n845721
"Russians penetrated U.S. voter systems, top U.S. official says"
"We saw a targeting of 21 states and an exceptionally small number of them were actually successfully penetrated."
I don't know what that means exactly. I've always been under the impression that no actual votes were tampered with, and that still appears to be the case.
"There is no evidence that any of the registration rolls were altered in any fashion, according to U.S. officials."