10,000,000 illegals are coming in every year? No way.
10,000,000? I'd laugh at that - but 3,000,000 is possible.
I doubt it. I'd say 2 or 3 million individual people. Now on border towns you get a lot that come across just or the day and sneak back the other way (or deliberately get caught and driven back, along with a free burger). Now if you count those as individual crossing instead of people you could get a number in the tens of millions pretty easy.