The US has made it very clear that its populace is willing to elect an uneducated populist buffoon, who is happy to break any and all international commitments if it appeals to his base.
Any politician outside the US, from this point onwards, will assume that the US is not a country that can be trusted with any long term plans. (Or, as far as our allies are concerned, with intelligence materials either). It will likely take decades to repair that reputation hit, if it isn't irreparable.
We're not feeling the consequences of it yet, but we will. That's inevitable. You don't suddenly walk into a ballroom, shit on a table, and hope everybody forgets it next week.