House Minority Leader Nancy Pelosi (D-Calif.) named Thompson the chairman of the committee in response to the shooting massacre at Sandy Hook Elementary School in Newtown, Conn., in December. The shooting resulted in 27 dead including 20 children.

The vice chairmen include Rep. Ron BarberRonald (Ron) Sylvester BarberPrinciples and actions mean more than Jeff Flakeā€™s words Giffords to lawmakers avoiding town halls: 'Have some courage' Ten House seats Dems hope Trump will tilt MORE (D-Ariz.), who survived a shooting in Tucscon, Ariz., in early 2011. Then-Rep. Gabrielle Giffords (D-Ariz.) was the target of that shooting.

Other vice chairmen on the task force, all Democrats, are: Reps. John Dingell (Mich.), Bill Enyart (Ill.), Elizabeth Etsy (Conn.), Chaka Fattah (Pa.), Carolyn McCarthyCarolyn McCarthyWhy Congress needs an openly atheist member, now Lobbying World Lobbying world MORE (N.Y.), Grace Napolitano (Calif.), Ed Perlmutter (Colo.), David Price (N.C.) Bobby ScottRobert (Bobby) Cortez ScottOvernight Health Care: Trump eases rules on insurance outside ObamaCare | HHS office on religious rights gets 300 complaints in a month | GOP chair eyes opioid bill vote by Memorial Day Overnight Regulation: Trump to take steps to ban bump stocks | Trump eases rules on insurance sold outside of ObamaCare | FCC to officially rescind net neutrality Thursday | Obama EPA chief: Reg rollback won't stand Dems decry ObamaCare change as new attempt at 'sabotage' MORE (Va.), Jackie Speier (Calif.), and Bennie Thompson (Miss.)

President Obama has also vowed to take new steps to reduce gun violence and prevent shootings similar to Sandy Hook. He appointed Vice President Biden as the head of a separate effort to come up with solutions to preventing gun violence.

A number of Republican and Democratic lawmakers, including a few with "A" ratings from the National Rifle Association, have called for federal "action" to reduce gun violence.