In 2016, when his company was negotiating a potential deal in Moscow, Donald J. Trump suggested that there was no need for the United States to penalize Russia over Crimea.
https://www.nytimes.com/2018/11/29/us/politics/trump-cohen-russia-sanctions.html
https://112.ua/statji/sammit-g20-bitva-ukrainy-za-novye-sankcii-protiv-rossii-471558.html
http://www.dsnews.ua/world/putiny-deti-28112018220000
https://republic.ru/posts/92565
https://www.gazeta.ru/business/2018/11/29/12077107.shtml
https://www.gazeta.ru/comments/2018/11/29_e_12076915.shtml
https://www.kommersant.ru/doc/3813460