Trump’s remarks do make sense once you realize he’s a narcissist devoid of empathy who can’t help but praise the side he thinks is “winning.” But yes, it still is kind of shocking that a person like that was president and has a good shot at being reelected.
… and the rest of the world.
If you are an ally of the US, Trump has proven that the relationship means nothing to him and he has no problem removing us from NATO and all other pacts. The world should be concerned.