[wfh]

If you mean the existing H-1B lottery, see sibling comment linking the Forbes article which says "However, attorneys say attempting to reorder the H-1B lottery from highest to lowest salary by regulation, as the administration has discussed, would be unlikely to survive a legal challenge."

[AlchemistCamp]

There’s nothing in the constitution preventing legislators from altering H-1B regulations that I know of. What kind of legal challenge are you referring to, exactly?