It really is that simple, but seems to be impossible politically.
The laws are already there, but some judges and justices are blatantly ignoring and dismissing them.
More laws won’t help if they aren’t or won’t be enforced.
The problem is this - the left cares more about having open borders than we on the right care about having them closed. They are activist fighters we are passive voters, if we can even be bothered to do that.