Santorum is such a flawed candidate that he could not even be elected dog catcher. He publicly announces that he will not follow decisions made by the SCOTUS that are contrary to his own belief system which would scare most thoughtful voters. The total abolition of ABC, which is the essence of Santorum’s campaign is so far out in left field that he makes himself irreverent.
Santorum’s potential challenge to the SCOTUS is an appeal to the Legislative Branch to pass better new law(s) on the subject at hand or possibly engage in more judicial review than it has in the past. Is it a little off topic per the specifics of the Pope’s potential encyclical “on climate change”?

Oh, well, valid enough considering Santorum is the first word of the thread – and he is advising SCOTUS similarly to advising Pope Francis (unofficially as a layman in both cases, if you will). That is, he is no longer a sitting Congressman or Senator yet has made a recommendation.
I think it’s a refreshing point of view, and while such hasn’t been DONE much, maybe its time for Congress to flex its legislative muscle and exercise its rights (whether such legislation gets PASSED and approved or not, IMO). There’s precedent for previous SCOTUS’s being wrong and people continuing on with their belief systems (unto victory sometimes).
Precedent? The Dred Scott Decision Was Also Contrary to Some "Belief Systems"
The most famous incident of such that may be familiar to us would be the Dred Scott Decision (of the SCOTUS) which “decided” that runaway slaves who made it to free states were nonetheless property to be returned to their “owners”. It was later countermanded by the Civil Rights Act of 1866 and later by the framers of the 14th Amendment.

to those Congresses and Senates … possibly led by someone with conviction (not unlike Santorum at his best?).
Oh, and

to an enlightened Administrative branch before that – and President Lincoln’s Emancipation Proclamation – who also “did not follow that* decision made by a SCOTUS.*”
**Judiciary Has Its Checks and Balances Too – In Theory If Not in Recent Practice
**
There are checks and balances in the American Governmental system. The Judiciary is co-equal to Legislative Branch (the congress Santorum is referring to) and the Administrative Branch (the presidency, cabinet, etc.) - not superior to them.
The three branches have their own sphere of influence Legislative (lawmaking, overseeing the administration through advise and consent, and approving judges and cabinet appointments), Administrative (administering the departments of the federal government, signing new laws into existence with congress, appointing judges), Judiciary (litigating court cases, defining the laws in practice).