This Wall Street Journal article by Joe Parkinson and Georgi Kantchev shows more than the willingness of Russia to meddle in foreign elections:
In the run-up to presidential elections in Bulgaria last year, the country’s opposition Socialist Party received a secret strategy document proposing a road map to victory at the ballot box, according to five current or former Bulgarian officials.
Among its recommendations: plant fake news and promote exaggerated polling data.
The source of the roughly 30-page dossier, intercepted by Bulgaria’s security service, was a think tank connected to the Kremlin, according to the officials. It was delivered by a former Russian spy on a U.S. sanctions list, three of them said.
Investigators should peruse the internal documents of the national Democrat Party and correspondence of mainstream media’s JournoList. They might find that the Russians are also guilty of plagiarism, because the tactics described above look awfully familiar.