Many of the more than 1,000 bills pending around the country would nullify the effect of any federal ban on firearms, assault weapons and high-capacity ammunition magazines, according to the National Conference of State Legislatures.

And nationwide, a CNN/ORC International poll out Monday suggested that support for major restrictions on guns may be fading three months after the Newtown killings. While a majority of Americans favored major restrictions on guns or an outright ban in the immediate aftermath of that massacre, support for gun control has fallen to 43% since that December tragedy, the poll found.