Trump on Canada: "You have that artificial line because it is straight artificial and look like it was drawn by a ruler. I don't mean a ruler like a king but a ruler like a ruler this way. It is just an artificial line that was drawn in the sand."
In conclusion, let's eliminate the US by dividing their territory between Mexico and Canada in an organic line. /sarcasm
It's not as though there are any other straight-line borders in the Americas.