The country’s leadership will need to navigate a turbulent international landscape, as well as political and military realities that will constrain its options.Here are 5 major trends to watch in the year to come that will shape expectations for the potential end of the Russia-Ukraine war, or move it to its next stage.The “Trump 2” Presidency: Instability and Isolationism?President-elect Donald Trump has made ending the Russia-Ukraine war a priority – but on what terms? His inbound administration counts many Ukraine sceptics and even Russia sympathizers; he is antagonistic towards allies.Encouragingly, both Trump and his Special Envoy for Ukraine and Russia Keith Kellogg seem interested in maintaining or even increasing military support for Ukraine (if only to boost U.S. defense production ahead of potential conflict with China).But the main source of tension is that, ultimately, the U.S.