You are mistaken on several levels. First of all, treaties do not "take effect" merely because the Senate approves them. The Senate does not ratify treaties. It can, however, approve a treaty which can then be ratified by the inclusive parties, should they wish to proceed.
You are also VERY mistaken to claim that a "presidential agreement" does not carry the full weight of the law. It is as lawfully binding as if the Senate had approved it. That is not the same as the Senate voting down on such a measure, which would express the Senate's disapproval.
As far as some future president altering or cancelling an existing treaty, that can happen, and has happened, to even Senate approved treaties. There is nothing special about a treaty the Senate does not vote on to approve.
An Executive Treaty is merely an agreement between two heads of states...
'You do this and I'll do that'.
Which is perfectly fine in most circumstances, wherein the Executive is actually loyal to the Nation, whose principles, he supposedly represents.
In the United States, a Constitutional Republic... this loyalty status is usually maintained by the Constitutional requirement that the Chief Executive be a "Natural Born Citizen of the United States".
Sadly, the US being long since infected with a perversion of human reasoning, which rationalizes that Foreign Ideas Hostile to American Principle act as a balance against the recognition and defense of and adherence to the Principles that define America... a popular swell provided that a person who is
NOT a
Natural Born Citizen of the United States was elected Chief Executive.
The reason that the US Constitution precludes native born individuals NOT born in the natural consequence of two citizen parents, OKA: A Natural Born Citizen... is that where a person is born to a Foreign National, there exist an axiomatic split loyalty. We know this to be true in obama's case, in that he took the extra-measure of actually pretending to write a book, wherein his ghost writer extolls the virtues of Communism, a deviant species of human reasoning which is decidedly hostile to American Principle.
Therein, and through the history of his administrative cult, in lending aid and comfort through the shifting of policy to the benefit of those of demonstrated hostility to the United States, having consistently promoted the interests of the enemies of the United States, to the point that International Islamic Terrorism is today, in VASTLY better shape than it was on 9-11-01. Meaning that obama has reversed 8 years of US effort to degrade the means of Islam to wage war and in particular, to wage war against the United States.
And it is in THAT, which reasonable US Citizens, OKA: Americans, KNOW that where the issue is an Islamic enemy of the United States and their acquisition of Nuclear weapons, and the question is,
"What will obama do?", the reasonable answer is that he will promote their means to do so.
Therefore... the 47 Americans in the Senate, did what NO ONE ELSE IN US FEDERAL GOVERNMENT WERE WILLING TO DO: They stood up and publicly denounced policy discussions which are destructive to the Security of the United States.
Meaning that obama made the most feckless governing body on the planet, into something, which when compared to him... APPEAR TO BE PURVEYORS OF UNERRING LEADERSHIP!
Possibly for the first time in the history of the United States Senate... they took a firm position in the face of a highly destructive executive subversive.
