I expect this has been posited already, but my network is more of a stirring straw than a pipe.

The comey tweet: maybe its just an announcement, like 'my dog died'

That is, now RBG (who was small and kept around because the lefties found her vocalizations sweet to their ears) is a "mockingbird" who has died/been killed.

Not a call to action anymore than the old-dog tweet. "When do we spring this?" not "Come out of hiding and kill x"