WASHINGTON – Democrats in Congress are proposing an overhaul of police procedures and accountability after the mass protests over the deaths of black Americans at the hand of law enforcement.The Justice in Policing Act is among the most ambitious law enforcement reforms from Congress in years and confronts several aspects of policing that have come under strong criticism, especially as more and more police violence is captured on cellphone video and shared across the nation and the world.The package limits legal protections for police, creates a national database of excessive-force incidents and bans police choke holds, among other changes that, The changes, if enacted, would have massive implications on policing in the U.S.It’s not clear.