Generally here in the USA men in professional situations don't go around kissing women on the cheek that they have never met before. In most circumstances that would be seen as awkward at best, and maybe an example of sexual harassment. A handshake is the normal American greeting in formal business situations.
In most situations even in social circumstances in the USA kissing some woman you've never met before is frowned upon. It is particularly a bad idea in biker bars, at rodeos, and when meeting some guy and his wife for the first time.
Perhaps the POTUS thought he was in Thailand in one of those "tourist" neighborhoods, instead of meeting a world renowned leader.
You are quite correct.
My comments were meant generally with regard to whether foreigners or natives should make the adjustments.
It seems Americans are the ones always expected to adjust, whether they are here or overseas.
Now you tell me.
And only if the woman extends her hand first.