"White House defends Obama evading Senate on Paris climate deal"

"White House senior adviser Brian Deese said the president has the legal authority to ratify the accord without the two-thirds Senate vote required for treaties. He said the pact negotiated by 195 countries in December is merely an “executive agreement.”"

“The president will use his authority that has been used in dozens of executive agreements in the past to join and formally deposit our instrument of acceptance, and therefore put our country as a party to the Paris Agreement,” Mr. Deese said at a White House press conference.

He noted that both presidents announced in March that they “would seek to formally join the Paris Agreement in 2016.”

“That’s a process that is quite well-established in our existing legal system and in the context of international agreements and international arrangements,” Mr. Deese said. “There is a category of them that are treaties that require advice and consent from the Senate, but there’s a broad category of executive agreements where the executive can enter into those agreements without that advice and consent.”