That remains true even if the legitimate reason for the stop is secondary and the officer is motivated primarily by a hunch or some other reason that is insufficient to justify a stop.
This is not Law, this is a way to get around the Constitution. The last election has empowered these people to trash the Document and start over. I support that if they do it in some other country. I see all too many people in power telling me they want to "scrap" the 2A.