https://www.radiosvoboda.org/a/30335681.html
One former senior White House official said Trump even stated so explicitly at one point, saying he knew Ukraine was the real culprit because “Putin told me.”
https://www.rbc.ru/newspaper/2019/12/19/5dfa3b5f9a7947218af57cbc
https://www.kommersant.ru/doc/4198716
https://www.inopressa.ru/article/18Dec2019/nytimes/markov.html
https://www.inopressa.ru/article/18Dec2019/bild/netz.html