I don't know about the whole country, but the police unions have been rumbling for years in NYC. The men on the ground lean right, but the union leans left. They understand that politicians have to be bought, and apparently it's easier to buy democrats, but when you have situations where Mayor Bubblehead DiBlasio and The Vampire Chuck Schumer are denigrating police while pocketing tons of their union dues, the actual police officers do not like it.
Will the members abandon the unions, though? I doubt it. They have very sweet contracts. Will cities grab this opportunity to renege on those contracts by disbanding the police departments? Maybe. Will that negate their contracted debts? Absolutely not.
Still, the sweetheart retirement deals city services have are bankrupting big cities. There will be a strong will to end these service organizations to wipe the slate clean and start again. If the cities devolve into chaos, the politicians won't care. They have guns.

The last great hurdle of the left...the police.

Well Spike the police will NOT police them self's and Good cops can't say a thing or they get drummed out People know this & do not trust any of them ! . Looks like People are so afraid they won't even leave a post here . Now Thats TRUE FEAR !