Trump is also weakening America’s negotiating position by repeatedly and prematurely signalling the concessions the US is willing to make.
Historically, Russia has responded to strength, not appeasement. As US diplomat and historian George Kennan famously stated in his 1946 Long Telegram, the Soviet Union understood only the language of power. He was proven right — throughout and since the Cold War, Western concessions have often invigorated rather than calmed Russian aggression.