text: Before I built a wall I'd ask to know 
  What I was walling in or walling out, 
  And to whom I was like to give offence.
  
  
  Canada and United States are two separate, sovereign nations that share a border and many common interests but we are not one, nor meant to be. 
  
  Trump does not respect borders, agreements,  goodwill and good faith. Limiting our exposure to a bad neighbor is just plain common sense.