Actually that is not something you know.

He was photographed with Mook at some event where you need to wear nametags. It was probably some political event or Mixer. He was not well known, his father was. This is the type of event where a high status person like Mook would be asked to pose with lower status folks. And they would be happy to pose as it helps with networking/partybuilding.

I'm not being tendentious on this.

This picture is the only evidence put forward as part of the friendship. I'm open to other evidence, but so far none has been put forward. There's a lot of reasons that argue against them being friends. Mook only came to NY recently. He's older and they didn't attend the same schools. It's highly unlikely he would have met Schwartz before the campaign. Schwartz was definitely in political circles, but is there any evidence he spent a lot of time at campaign headquarters, where Mook would be spending most of his time? Maybe they did not each other before or maybe they met in NY and hit it off. But being at event where nametags are required argues against a friendship.

Someone on here tried to tell me he was DeBalsio's Chief of Staff.

“The Post called him ‘a de Blasio staffer,’ ” Schwartz scoffed.

By that stretch of a definition, tens of thousands of New York City municipal employees working in any position in any agency could also be called de Blasio staffers.