Australia has begun a program called “Operation Sovereign Borders” to stop illegal immigration:
Pretty cut and dried, huh?
Operation Sovereign Borders (OSB) is a military-led border security initiative to stop the boats, prevent people risking their lives at sea in the hands of criminals, and preserve the integrity of Australia’s immigration program.
Asylum seekers who travel by boat without a visa will not end up in Australia. The rules apply to everyone; families, children, unaccompanied children, educated and skilled. There are no exceptions.
Australia is serious about protecting its borders and will stop anyone who attempts to come illegally by boat.
Seeing as how the only way to get to Australia is either by plane or boat, this is a very, very clear message and clear program.
The US could easily do something similar. Simply explain that if you come illegally, you will be removed – and then do so. Of course, that would require parties in power to actually listen to the citizenry, actually want to secure the borders and protect the nation – and then actually do their jobs to secure the borders.