By Parliament, actually, which is finally exercising its supremacy over the Executive. You could almost say it’s taking back control.
Insofar as Brexit is concerned, it’s a bit like Charles Hawtry getting in the ring with Muhammed Ali.
Charles could spend the rest of eternity pointlessly flailing-away, and still never put a mark on Ali; who would simply look bewildered, and wonder what the fu*ck was going on.
I’ll let you consider which is which, and who the aggressor is.