The change is not as earth-shattering as some reports and announcements on Twitter might make it.
http://www.nationalinterest.org/feature/trumps-ukraine-lethal-aid-approval-not-gamechanger-23744
https://focus.ua/opinions/387577/
http://day.kyiv.ua/ru/article/den-planety/krymskiy-kinzhal-v-rukah-kremlya
https://www.gazeta.ru/social/2017/12/22/11517392.shtml
The Trump administration released its first National Security Strategy on December 18, outlining broad U.S. foreign policy strategies, tools, and goals. Experts from across Brookings offer their comments on the document.
https://www.brookings.edu/research/brookings-experts-on-trumps-national-security-strategy/
https://focus.ua/opinions/387550/
Президент готовится подписать план широкомасштабного перевооружения на фоне территориальных амбиций и эскалации с Западом
http://inosmi.ru/politic/20171221/241061918.html
Russia alone can neither guarantee the future security of Syria nor mobilize the resources to enable it to recover and rebuild. Only by linking arms with the international community to edge out Iran, forge broader-based governance and spur economic growth can Russia hope to achieve lasting success in Syria.
https://www.rand.org/blog/2017/12/russia-trapped-in-syria.html