Cruz Has the Solution

Let's face it:  the "Constitutional Amendment" route is foo-foo-dust.  It won't happen.  Thus, the Walker proposal is just that:  foo-foo-dust.  No surprise, as Walker is running as the 'credible moderate-rightist' candidate, which distinguishes him from Bush, Graham, Jindal, and certainly, The Donald, who is barely credible but a helluva lot of fun to watch.

Cruz, on the other hand, has an idea which WILL work:  strip the Federal Courts of authority on certain matters.

...Article III, Section 2, Clause 2 of the Constitution explicitly grants Congress the authority to regulate and limit the appellate jurisdiction of the Supreme Court....it is clear as day that Congress can banish the courts from specific issues and regulate the scope of their jurisdiction....

(The reaction of the State of Texas shows that Jindal's 'bend over and take it' position is a bit limp, too.)

Unlike the "amendment" solution, stripping the Fed Courts of jurisdiction is eminently do-able, and in a much shorter time-frame.  And as the linked essay demonstrates, there is urgency.  Lower courts are even more Leftist than SCOTUS and actually have more impact on the country.