News the Boulder City government and their elite progressive supporters can use – Circuit court judge blocks Deerfield, Ill., from banning ‘assault weapons’ – twitchy.com

The ordinance stated that the possession, manufacture, and sale of assault weapons in the Village of Deerfield “ is not reasonably necessary to protect an individual’s right of self-defense or the preservation or efficiency of a well-regulated militia.”

It is a preemption of state law…

… had challenged the ban on the grounds that it violates the state’s preemption law that was adopted in 2013. That change amended state statute that declared “the regulation of the possession or ownership of assault weapons are exclusive powers and functions of this State. Any ordinance or regulation, or portion of that ordinance or regulation, that purports to regulate the possession or ownership of assault weapons in a manner that is inconsistent with this Act, shall be invalid…”

The City of Boulder law also attempts to preempt Colorado state law.