America's war goal is war. If Ukraine 'won' quickly, the next war may not be easy to find quickly. Better for everyone to keep this one going as long as possible.
Not sure why this was down voted. The incentives for our politicians to create wars are very strong. They can convince themselves and others of the verocity of their reasons but war is a benefit to them. All they have to do is signal a desire for conflict (or a response to conflict) and the campaign dollars pour in.