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://www.ft.com/content/763b2eb2-f2f4-11e8-ae55-df4bf40f9d0d
https://www.inopressa.ru/article/29Nov2018/ft/japan.html
https://www.mk.ru/economics/2018/11/29/moskva-i-pekin-ukreplyayut-sotrudnichestvo-v-energetike.html
https://www.bbc.com/russian/news-46368680
http://www.rosbalt.ru/world/2018/11/29/1749887.html
https://www.kommersant.ru/doc/3813747
https://www.kommersant.ru/doc/3814465