Give Trump a few more months then? The USA has shown itself so far be unreliable, and if not quite an enemy also not quite an ally while demanding 100% loyalty the other way around. This obviously will not hold, you can not combine those two and expect a static situation as the outcome.
I mean to what are we comparing America's reliability? To the reliability of the European Union? Which calls Ukraine not just an ally but also its shield, and then pays Putin more money than it provides aid to Ukraine. And this after we've been paying 50 cents per kwh for decades, while talking about how we're moving away from oil dependence and toward green energy.