WASHINGTON, DC - JULY 05: A young boy carries a anti-gun poster during a rally at the Capitol Hill, July 5, 2016 in Washington, DC. People with the group, "D.C. Moms and Dads for Rational Gun Safety Legislation" held a rally to urge members of Congress to come up with meaningful national legislation to prevent gun violence. (Photo by Mark Wilson/Getty Images)

TOPSHOT - US President Barack Obama hugs his daughter Malia on her birthday during an Independence Day Celebration for military members and administration staff on July 4, 2016 in the East Room of the White House in Washington, DC. / AFP PHOTO / Mandel NganMANDEL NGAN/AFP/Getty Images

WASHINGTON, DC - JULY 05: Avery Drobnyk, (bottom), 7, and her sister Eleanor Drobnyk, 5, make anti-gun posters before marching with their mom to Capitol Hill, July 5, 2016 in Washington, DC. The group "D.C. Moms and Dads for Rational Gun Safety Legislation" held a rally then marched the US Capitol to urge members of Congress to come up with meaningful national legislation to prevent gun violence. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 05: Avery Drobnyk, (R), 7, and her sister Eleanor Drobnyk, 5, make anti-gun posters before marching with their mom to Capitol Hill, July 5, 2016 in Washington, DC. The group "D.C. Moms and Dads for Rational Gun Safety Legislation" held a rally then marched the US Capitol to urge members of Congress to come up with meaningful national legislation to prevent gun violence. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 05: Brother and sister, Abraham Infield-Shah, (R), 4, and Ava Infield-Shaw, 7, carry anti-gun posters they made before marching with their dad to Capitol Hill, July 5, 2016 in Washington, DC. The group "D.C. Moms and Dads for Rational Gun Safety Legislation" held a rally then marched the US Capitol to urge members of Congress to come up with meaningful national legislation to prevent gun violence. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 05: Mothers attend the "D.C. Moms and Dads for Rational Gun Safety Legislation" rally at the US Capitol July 5, 2016 in Washington, DC. The rally was held to urge members of Congress to come up with meaningful national legislation to prevent gun violence. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 05: Famlies with the group "D.C. Moms and Dads for Rational Gun Safety Legislation" carry anti-gun posters as they march to the US Capitol July 5, 2016 in Washington, DC. The rally was held to urge members of Congress to come up with meaningful national legislation to prevent gun violence. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - JULY 4: President Barack Obama hugs his daughter Malia Obama at the Fourth of July White House party on July 4, 2016 in Washington, DC. Maila Obama celebrated her 18th birthday during the party, which featured guests including singers Janelle Monae and Kendrick Lamar. (Photo by Aude Guerrucci-Pool/Getty Images)