BLOODY BAD DEAL, BARRY!

Every U.S. president has tried in various ways to body swerve Congress and the Senate on major domestic policy disagreements; but Ayatollah Iran - nuke wannabes and number one global terror sponsor - hardly fall into the category of one more domestic tiff on the Hill. Mr Obama has made known his intentions to bypass the Senate, but here's the thing. Any deal reached with Iran would technically be an “executive agreement” with a foreign government, rather than a treaty; which under the Constitution, requires approval by two-thirds of the Senate. Therefore, it would be a non-binding agreement which would not supersede existing U.S. laws. Iran wouldn’t be legally bound to adhere to it nor would the United States or its allies be legally compelled to do anything about violations.
Congress has passed numerous economic sanctions against Iran. Since these sanctions will not be lifted by this Congress, Iran would have an excuse to void the agreement. President Obama can grant waivers of sanctions under certain circumstances but he can’t ignore them, not without violating the Constitution. 
For ten years, Iran has blatantly lied about it's intention, been caught lying to the U.N. nuclear inspectors and everyone else on the planet. Iran can be trusted to the same extent as having three black widow spiders down yer undies and expecting to be alive 24 hours later.