I would guess it is because of the whole thing where a treaty can be agreed to but isn't ratified unless the Senate approves it https://en.wikipedia.org/wiki/Ra

I would guess it is because of the whole thing where a treaty can be agreed to but isn't ratified unless the Senate approves it https://en.wikipedia.org/wiki/Ratification#United_States https://en.wikipedia.org/wiki/Ratification#United_States