A 2016 study by Dov H. Levin found that, among 938 global elections examined, the United States and Russia (including its predecessor, the Soviet Union) combine

A 2016 study by Dov H. Levin found that, among 938 global elections examined, the United States and Russia (including its predecessor, the Soviet Union) combined had involved themselves in about one out of nine (117), with the majority of those (68%) being through covert, rather than overt, actions. ... According to the study, the U.S. intervened in 81 foreign elections between 1946 and 2000, while the Soviet Union or Russia intervened in 36. https://en.wikipedia.org/wiki/Foreign_electoral_intervention https://en.wikipedia.org/wiki/Foreign_electoral_intervention