Why would any country trust the USA as an ally?
We (Obama) convinced Ukraine to give up their nuclear weapons in exchange for assurances America would protect against any attacks from Russia.
We’ve funded the enemies of Israel, our ally.
We are giving the green light to Iran to become a nuclear power. That’s the number one sponsor of terrorism on the planet.
We abandoned the people of Afghanistan after they helped us fight the Taliban. We even gave the Taliban their names and pictures.
I think as a practical matter, none do. It's all situational wheeling and dealing. No honor among thieves and so on.
US never made a deal it didn't break.