The police have basically no legally mandated duty and have always been granted the authority to determine how much they enforce whatever laws they wish to. This is actually a better outcome than the alternative of mandating absolute compliance because they're not lawyers and would be constantly in trouble for being either over or under zealous while they grapple with what is or is not a chargeable offense.

PPD is of course taking this discretion to extremes. But there's very little that can be done by anyone outside of the federal government. Due to supreme court precedent and the power of the fraternal order of police, it would take a literal act of congress. That congress would then immediately face their toughest reelection, as would the sitting president, allowing it to immediately be undone