Teams: Red Bull NY, US Mens National Team
I think 20 is just right, for now, but I can see US(A) supporting 40 teams, 4 divisions, top 4 from each make playoffs (North East, South, West, Midwest). The "old NASL" had as much as 32 teams at one point, to my recollection ... yes I was around then !!!
That could limit travel, and create better regional rivalries. He continues to grow the game, thus far he hasn't taken a wrong step, IMHO.
Go Don, Go !!!