It's politics by results. The rational approach is a difficult route to take with American Politics because it has been deliberately sabotaged by subverting the meanings of the terms. For example outside the US the term 'left' means less disparity in wealth. But in the US it seems to usually mean just whatever the Democratic Party favors at that time. Therefore it is best to evaluate policies not by explanations but at results.
Right now we have what is claimed to be a moderate left candidate. So we have massive money flowing to the weapons makers, and not to the American working class as you might expect someone on the actual left to do. And now we have bloodbath in Ukraine which coincided with the arrival of US weapons, which started 1 year into the Biden administration having not started in the four years of the Trump administration. That's an empirical approach. The rationalist approach, is the pile of excuses and how Biden would have done it all better and is doing it all better right now. And maybe we will get a nuclear war, and that will also be Trump's fault.