Again, Fentanyl and other opiods are currently streaming across the border and we have more wherewithal to stop it than they did.
Also, if you bothered to read the newspaper accounts of the time you would understand that many did not think it possible to stop trade across the borders, and additionally, some Northern ports were going to refuse to collect the tariffs if the Southern ports did not have to do so. They correctly recognized that to collect high tariffs would have put them at a severe trade disadvantage.
Yeah, all border patrol needs to do is watch the three border crossings and stop every covered wagon coming across and they'd dry that traffic right up.
Also, if you bothered to read the newspaper accounts of the time you would understand that many did not think it possible to stop trade across the borders, and additionally, some Northern ports were going to refuse to collect the tariffs if the Southern ports did not have to do so.
You mean the newspaper editorials?