I want to know how the dems knew there was something there with the bridge closings, to look at to begin with?
Probably because such behavior is de rigueur in politics, especially among the Dems who dominate the NE. Offend the powers that be and suddenly your street will be in need of repairs and will be torn up, your trash somehow doesn't get collected, city inspectors show up and find you have several violations. That sort of thing is done all the time and the Dems, who practice such harassment assiduously, recognize it when they see it.