Even you have to admit that it doesn't take 4,000 troops to guard each mile of Korean border. Those soldiers and equipment are there to counter an armed invasion, if it comes.
We've had this discussion before. We agreed it would only take about 70,000 troops to guard a 30-foot-tall wall on the border. That's 42,000 to guard the border working 3 shifts with an extra 28,000 for days off, sick leave, etc..
Just double that number for the Canadian border. It's not that big a deal.
The $70 billion we'll save in dollars spent on social services for illegal aliens and the $9 billion that illegals send home to Mexico, yearly, will more than pay for all of this security with money left over.
Simultaneously, we go after employers of illegal aliens and start mass deportions.
You mind explaining how you build a 30-foot wall across the Great Lakes?