Federal authority is defined and limited by the Constitution. This legislation specifically delineates that when Federal authority is used in violation and excess of the Constitution, it is unlawful and void.
If California tries to ban guns, that would also explicitly be in violation of the constitution, and similarly null and void.
Adding to what he said, for a laarrgggee part of the 20th century G men were looked down upon and interlopers, bootlickers and pretentious morons who only muddled up real police work. A large reason for that, has to do with the fact that municipal and county politics reigned supreme for something like 80% of our existence as a nation. We're only now seeing machinery from DC large enough to challenge the old school party bosses (A lot of that has to do with the Federal Governments century spanning war on the mafia and its after effects) and hilariously a lot of that is basically just The local party boss goes to Washington instead of Mister Smith. McConnell is probably the best current example of that and LBJ and Gingrich were stellar examples of that in the prior century.
That fight meant Federal Law Enforcement officers often times were on the receiving end of an ass whoop'n from Local Sheriffs and its partially what necessitated shit like the national guard being sent into the South or in 2006 when a city of Miami Police literally got into a WACO style siege with the FBI and Miami Dade Police and Hialeah Police refused any call to go help them out. And why the LAPD and the NYPD essentially operate like the private militias of their respective Mayors.
Opening the Ball on this, is going to be a return to form for the US, but its a return to form that is an odd contraction because it both vanished long before anyone here was born and yet operates out in the open and is still very prevalent.
This is just the first time the Good ol'boys/City bosses are acting against the whims of DC in a very, very long time.
Or to quote a Harlem Gangster "I warned the Bureau, tak'n on NYPD was gonna put 'em in a whole world of shit"
That can is already open, and lying there empty. The worms are all on the loose in the desert and happily making spice.
This particular can of worms having been opened in the
sixteen hundreds no less, we've already got one hell of a spice surplus.
Sanctuary cities have been mentioned by others - and if the Dems in California's big cities start making declarations like that, all the rural counties will give them the one finger salute.
"Only law enforcement people may carry, you say? Then in my capacity as sheriff I hereby deputize the entire male population of this town!"
Conversely - when the courts make pro-2A rulings, the police force in blue strongholds often just ignore that, and go right on treating Carrying While Black as a shoot-on-sight offence.
Judges ruling that shooting CPS agents is justified, Police Chief's flat out warning Federal agents that they'll be fired on if they attempted to enforce Obama era policies and Justice Moore repeatedly telling the US Supreme Court to eat a bag of dicks...etc
This has been happening for quite awhile, the only difference is now it's "official".