Why was prohibition in the U.S. done through a constitutional amendment rather than through a congressional bill or another way that we classify substances as "illegal"?

by classyminnesotan
adirockets

You may find this answer thead with the same question to be helpful: https://www.reddit.com/r/AskHistorians/comments/14yrox/why_did_prohibition_require_an_amendment_while/?utm_source=share&utm_medium=web2x