'Calling out the US's involvement in Nato' is a broad brush statement. Trump has been calling for European countries to pay a higher share of NATO expenses for decades. To do this he has at various times threatened the NATO Alliance. However, this is a negotiating tactic. How do we know it's merely a negotiating tactic? He didn't do a damned thing about pulling the US out of NATO during his first term. However, he did demand Europeans pay more.
Russia has enlarged its territory during the past two Democratic administrations. Something it felt unwilling or unable to attempt during the supposedly Manchurian Presidency of Donald Trump.
Trump has only about four political ideals that have remained constant during his adult life. Less US foreign wars/expenses, clamp down on illegal immigration, trade and moderately pro-abortion. That's about it. He's an old school Dem rebranded as a modern maga Republican.