You should plan on taking the far north, too. Don't forget all of Alaska's resources, sea coast, defensibility, etc. Yeah, Alaska is a good one. Oh. We'll build our own fence. (Man, I'd like to be the fencing contractor for THAT job...)
My idea is not to build a fence so much, as a walled, trap-filled maze across the length of the border, which is modularly designed so that we can change the layout regularly. Leave the entrances open and let the ones who want to have a go at it try. Ladders and cutting through fences would be useless, since they’d just end up in the maze anyway. Design it to be dangerous enough so that only the most cunning will be able to avoid a painful death.
Anyone who can get through, can apply for fast-track to citizenship, since we’ll only be getting the best of them. A Darwinian gauntlet, if you will :)
OK; we’ll take Alaska and the liberals can have Hawai’i. Suits them, to loll about. And there will be LOTS of fence contracting; because we not only need to build one at the Mexican border, but also a longer one to keep the liberals from coming south.
It’ll be like the partition of India and Pakistan — liberals going north with their Louis Vuitton dog carriers and Yves Saint Laurent luggage; conservatives going south with their camper coolers and plastic trash bags full of clothes. LOL!
We will need an easement for the Alaska pipeline, that’s all.