This may be a simple instance of political corruption. The mayor will look at each companys contributions to his political opposition (the NRA) and determine whether the company will get a city purchase order. It is an attack on the NRA performed by threatening the NRAs supporters.
Hey, if you eat at Bobs restaurant, I might not be buying my next car from you. Maybe you should reconsider where you eat...whadya think?
Unvarnished, old-fashioned corruption.