I'm not sure why people think anarchy would take over after the crime fighting force of any city was disbanded. In what world would the government stand by and watch a city burn? In reality, if a city refuses to protect its populace, the federal government will step in. Introducing the federal police. Police that answer directly to the federal government. You think the executive branch has power now, wait until the federal police arrive. Think Trump's a dictator? Wait until he controls the police. Then you'll see a dictator. Mayors, governors, city councils, who needs 'em? The federal police are here to save the day. You've removed your city's one and only line of defense and now you have nothing. Everything a federal government could ask for. Know who else was a fan of federal policing? Hitler, Stalin, Mao Zedong... you know, only the greatest mass murderers in history.
So go ahead. Run outside. Break glass, burn buildings, loot stores, hold those "defund the police!" signs up high, because if you ask for it hard enough you'll get it, but you don't know what you're asking for. Under no circumstances does any national government let a city deteriorate into a lawless wasteland. They'll step in and do the city's job for it if said city abdicates that responsibility. Don't fool yourself into thinking otherwise. Others who did so either ended up dead or under fascism's heel.