About 1,500 state gun bills were introduced in the year after the Newtown massacre.

178 passed at least one chamber of a state legislature. 109 have become law.

In the 12 months after the mass shooting at Sandy Hook Elementary School in Newtown, Conn., almost every state enacted at least one new gun law, according to a database compiled by the Law Center to Prevent Gun Violence. Nearly two-thirds of the new laws ease restrictions and expand the rights of gun owners. Most of those bills were approved in states controlled by Republicans. Those who support stricter regulations won some victories — mostly in states where the legislature and governorship are controlled by Democrats — to increase restrictions on gun use and ownership. Select categories from the table below to see all gun bills that passed at least one chamber of a state legislature.

39 tighten

gun restrictions Democratic Mixed control Republican Party in control of the state

legislature and the governorship 70 loosen

gun restrictions Democratic Mixed control Republican Party in control of the state

legislature and the governorship