None of the NATO county governments today (including the US government) could sustain the personnel loses resulting from a peer-level military conflict. After the loss of their first thousand casualties in a month, every one of these countries will withdraw and leave the Ukrainians to an even worse fate.
If this sh!t starts before November, President Trump’s election is certain, and he’ll stop it the day after inauguration.
Otherwise — after he is elected in November — this stupid sh!t WON’T start.
Far more than that, in the West it will cause countries to go bankrupt, cause governments and institutions to collapse, and cause societal upheaval. I fear the USA will not be immune this time.
Think of all the kings, czars and emporors who blithely entered WWI. How many survived?