And generally considered unconstitutional, until suddenly it wasn't, just like GWB nationalizing the TSA itself thereby creating the single largest case of the federal government pilfering through everyday Americans persons and property hunting for things that are legal to own. Which was also wildly considered unconstitutional, until it wasn't.

And go read the 4th amendment, with the understand that no one who signed it thought anything in the constitution authorizes any part of the federal government to ignore the absolutist language the bill of rights is written in. The assumption was that if there arose a need to justify the federal government searching people like this it needed a super majority to pass an amendment to fix it.