I already PM-ed you the respective links you want for the each of the items You don't have to interpret them individually as "advocating federalism," because you will have plenty of chances in the future to look at them that way in retrospect.
You might want to propose to split this thread because not everyone is interested exploring in detail my comments. I brought it up because federalism happens not because somebody orders it from a menu, but because of circumstances, needs, and experimentation. Yes, just like Canada, and just like how Canada never really declared independence. There was an instance where that was an option, but they didn't have to.