The US defence secretary, General James Mattis, told Estonia’s minister of defence that “Russia is trying to change international borders by force” and at meetings in May with Lithuania’s president and Baltic defence ministers “reassured US allies in the Baltic states of Lithuania, Latvia and Estonia of American solidarity with them and of US determination to defend Baltic and other NATO territory against any aggression.”
https://www.strategic-culture.org/news/2018/07/02/trump-putin-peace-trade-and-friendship-talks.html