This was a UNANIMOUS ruling against the Presidents action. This was the likes of Alito and Ginsburg agreeing on a similar verdict. Of Thomas and Sotomayer both issuing the same vote. Of Scalia and Kagan both saying "Nope".
In most cases I agree, it's a bit ridiculous to suggest you can consistently guess how the SCOTUS would rule. But this one was blatantly obvious, and that fact became even more crystal clear when they UNANIMOUSLY....judicially liberal and conservative...both said "no go".
This is basic civics. The Senate sets the rules for how the senate acts internally and only they have the power to declare themselves on recess. Allowing the President to decide when Congress is in recess by fiat is clearly and obvious a violation of the checks and balances built into our system. This is so blatantly obvious that every single SCOTUS Justice ruled against that.
To HONESTLY believe this action was constitutional, or stood even a REASONABLE chance of being upheld, one would either need to be utterly ignorant of constitutional law, so amazingly on the lunatic fringe of constitutional law that even Kagan and Sotomayer view your opinion as too liberal, or simply in denial.
This is not simply doing something overturned by the course. This is doing something blatantly and obviously unconstitutional and having it called as such by EVERY SINGLE JUSTICE on the court. And, specifically, this is the President himself not doing this...not simply a portion of th executive branch which is often used as a means of distinction when the other 9-0 cases against this current administration (or past administrations) are pointed out.
By the way, there is an option for that. The fourth one. And if you want to quibble on the notion of naivity being involved, I would love to see you put forth a compelling argument that ANYONE...specifically a constitutional scholar...should've had ANY hope what so ever that this action would've garnered 5 votes in support of it.