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
http://expert.ru/2018/11/28/kerchenskaya-polupobeda-petra-poroshenko/
http://www.rosbalt.ru/world/2018/11/29/1749766.html
https://www.rbc.ru/newspaper/2018/11/29/5bfd49709a794768e46076cd
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