Vancouver's mayor is ready to fight for affordable homes? 

You mean the same mayor that has for years been ... 

1)  ... quietly allowing conversion of rental buildings to condos. 

http://www.homesanddesign.ca/communities/location-key-for-pacific-point-refurbishment/ 

2)  ... allowing rentals to be torn down for investor condos.

http://vancouver.24hrs.ca/2016/01/12/vancouver-affordability-being-torn-down

The housing crisis all happened under Robertson's watch.  It is pretty late in the day to try and convince anyone that he listens to anyone but his friend Bob Rennie.