Federal Death Penalty - What's Unique to the Fedral Death Punishment?

There's the constitutional challenge under the eighth amendment, which the court really just wants to shut down. Then there's litigation over that same paroty provision, but not over the execution protocol. This enteat being pretty significant to what i think is probably one of the o most shocking, slash troublesome moments of the federal execution,. The dust in higgs was actually the last one before trump leaves office.