I'm not surprised at all Harris hasn't conceded yet (and she has no constitutional obligation to do so, just as Trump didn't back in 2020), and I could very easily imagine her highly contesting the results just as Gore did in 2000, maybe incite race riots in Blue states and cities, and their respective leaders would let them raise hell. I could also imagine Mayor Bowser putting DC under lockdown to prevent Trump and Vance from getting there in the first place, maybe even hold GOP politicians hostage there and raise equal hell there.