The invitation to attend that town hall meeting was extended  only through Liberal Kent Hehr's website and approved /vetted  through the Prime Minister's office. The venue is The university of Calgary, likely the only place where a quorum of like minded progressives could be found. A careful stage production. Trudeau could try the town halls of Fort McMurray , Red Deer or downtown Calgary outside of the cloistered environment of the Palliser Hotel if he really was interested in what real Albertans think.  Hint. Think tar, feathers or pitchforks as visual cues.