Vice President Joseph R. Biden (left), accompanied by New York Mayor Michael Bloomberg, speaks in New York's City Hall Blue Room on March 21, 2013. Relatives of shooting victims from Newtown, Conn., stood with Bloomberg and Biden as they spoke in favor of an assault weapons ban. (Associated Press)
In this photo combo, Wayne LaPierre, left, CEO of the National Rifle Association, makes remarks at CPAC 2013, at the Gaylord National Resort & Convention Center in National Harbor, Md., Friday, March 15, 2013; and at right, New York City Mayor Michael Bloomberg speaks to the Economic Club of Washington, Wednesday, Sept. 12, 2012, in Washington. LaPierre and Bloomberg claim their views on guns have the support of the overwhelming number of Americans. (AP Photo, Ron Sachs, Manuel Balce Ceneta)
Vice President Joseph R. Biden (left), accompanied by New York Mayor Michael Bloomberg, speaks in New York's City Hall Blue Room on March 21, 2013. Relatives of shooting victims from Newtown, Conn., stood with Bloomberg and Biden as they spoke in favor of an assault weapons ban. (Associated Press)
Vice President Joseph R. Biden (left), accompanied by New York Mayor Michael Bloomberg, speaks in New York's City Hall Blue Room on March 21, 2013. Relatives of shooting victims from Newtown, Conn., stood with Bloomberg and Biden as they spoke in favor of an assault weapons ban. (Associated Press)
Vice President Joseph R. Biden (left), accompanied by New York Mayor Michael Bloomberg, speaks in New York's City Hall Blue Room on March 21, 2013. Relatives of shooting victims from Newtown, Conn., stood with Bloomberg and Biden as they spoke in favor of an assault weapons ban. (Associated Press)
Bloomberg News **FILE** Sen. Dianne Feinstein
BLOOMBERG NEWS Barbara Boxer
