Zelensky has a tough fight on his hands to keep US Congress on board

President Volodymyr Zelensky's appeal to the West to help Ukraine defend itself against the Russian invasion has been one of the most remarkable achievements by any world leader in recent decades. But the strategic objective, both for Ukraine and for the United States, has now changed. Instead of having the weapons capability to defend against the Russian invasion force, the ambition now, and has been for some time, is to defeat Russia and throw all the occupying troops out of Ukraine. The objective now, seemingly accepted by the US, is to win a famous victory and to humble Russia into a humiliating withdrawal. It wasn't that long ago when the White House was talking about Ukraine doing well enough to force the Russians into a peace settlement. But not any longer. Now it's go go go all the way until the last Russian soldier has been driven out. While that is understandable, particularly from the Ukrainian standpoint, it presents a much tougher challenge for Zelensky, and for President Biden too, to persuade the US-lead coalition of 50 countries to continue arming and financing Kyiv until that famous victory is achieved. How long will that take? Is it actually achievable? Already Poland has announced it will no longer send weapons to Ukraine because it needs to spend money on arming its own military with advanced systems. Will other countries follow suit if they realise this war has no end in sight? Zelensky is addressing the US Congress today and he will repeat his mantra about how vital it is for the safety and security of the world for the fight against Russia to continue. He is right. But that's going to mean a helluva lot of dollars over the next few years. How much longer will the 50-nation coalition stick to its guns in its support of Zelensky and his beleagured nation?