Jan Brzezinski, Senior Fellow at the Atlantic Council, former Deputy Assistant Secretary of Defense for European and NATO Affairs, said this in an interview with Antin Borkovskyi, host of the Studio West program on Espreso TV channel.He described several scenarios for U.S. involvement in helping Ukraine.“Let me elaborate on the worst-case scenario, and then also on a more positive one that I believe is possible.In the worst-case scenario, Trump decides to pull out of the negotiations and refuses to continue providing security assistance to Ukraine, the weapons, missiles, and other support Ukraine needs to defend itself. That would be a serious but not decisive blow to Ukraine’s defenses. Ukraine could still sustain its defense, but it would be more difficult and more costly,” the expert said.In his opinion, in such a scenario, Ukraine is still capable of holding the line, but it will be much more difficult and expensive to do so.“Putin would be emboldened to a certain degree, but it would not mean the end of the war on Russia’s terms, at least not for a long time. In this case, it would become even more important for the Europeans to step up their support for Ukraine and intensify pressure on Russia. They have the capacity to do so. The question is whether they have the political will,” Brzezinski noted.He also spoke about an encouraging scenario.“I believe that if the Europeans significantly increase their efforts to support Ukraine by ramping up security assistance, using their economic power to impose stronger sanctions, and delivering a serious blow to the Russian war economy, that could shift the momentum of the war. Supporting the Russian opposition, both against the regime and the war itself, could further undermine Russia’s ability to continue the conflict. This approach could give Ukraine a real advantage and weaken Russia’s war effort,” the expert said.In his opinion, such a comprehensive approach could give Ukraine a real advantage and weaken the Russian military machine.“If Trump saw the Europeans acting decisively and driving momentum toward a Ukrainian victory, I believe he would want to be part of that. He would not want to be left out or appear weak or worse, complicit in supporting Russia. That is how I think he sees things. So if Europe does more, there is a good chance he would, too.One of the tragedies of this war is that the transatlantic community has an overwhelming advantage over Russia but is not fully using it. In the scenario I am describing, Trump could be leading an alliance with 55 trillion dollars in GDP against Russia’s 2 trillion,” Brzezinski emphasized.The expert stressed that this is a colossal economic power that currently remains untapped.“The alliance spends about 1.5 trillion dollars on defense annually, compared to Russia’s 200 billion, which does not even produce high-performance troops. The West has the capacity, it just needs the will.Right now, because of Trump’s outlook on Europe and the transatlantic alliance, the ball is in Europe’s court. Europe needs to step up and use its economic, military, and soft power to help Ukraine turn the tide. If it does, there is a good chance Trump would support that effort. If it does not, he will not do any more than he is doing now,” he summarized.