No it would not have been.
http://townhall.com/tipsheet/conncarroll/2015/03/03/can-obama-sign-a-nuclear-treaty-with-iran-without-senate-approval-n1964687
But, as The New York Times’ David Sanger first reported in October, Obama has already decided to bypass Congress on his Iranian arms deal entirely.
But doesn’t Article II, Section 2, Clause 2 of the United States Constitution read, “The President ... shall have Power, by and with the Advice and Consent of the Senate, to make Treaties, provided two thirds of the Senators present concur.”
How can Obama sign a nuclear arms deal with Iran without submitting that agreement to the Senate?
The same way that Obama has rewritten federal immigration and education law without Congress: by expanding executive power.
Obama will claim that his deal with Iran is not a treaty but a “sole executive agreement” that requires no approval from Congress. Sole executive agreements have been used by presidents since the early 1800s, but the exact scope of this power has long been in question.
Cruz's comments about "slowing down" Obama and "chance to review" are beyond thin and feeble.
Not only that, but the Obama-will-do-it-anyway is the worst of the worst lame excuses. That is like saying... well, let's give illegals amnesty because Obama will do it anyway.
Or, how about... let's give Obama everything he wants because he will do it anyway. Come to think of it, the Republican establishment (and Cruz 500% incr. H1B/TPA/Corker bill) does that anyway.