I'm glad none of you people had Pete Rozelle's or Lamar Hunt's ear.  Better to keep football just around the Great Lakes and a couple of east coast cities.  Or Walter O'Malley's, certainly the MLB should just consist in a quadrant of the country defined by the Atlantic, Canada, the Mississippi, and the Ohio.  Teams in LA, or even Houston, or Atlanta?  Dubious fans there.
 
Can the a pro sports league make it on just Canada?  Sure, its called the CFL, average pay is about $80K, less Canada's confiscatory taxes.  Add in the US border states, every one of which has consistantly lost population for over 50 years, and what you have is a minor league of no interest to US networks o US national advertizers.