"Congress has continued to debate the efficacy and constitutionality of federal regulation of firearms and ammunition, with strong advocates arguing for and against greater gun control. [...] In the 110th Congress, pro-gun Members of the House of Representatives, who were dissatisfied with the District's response to the Heller decision, passed a bill that would have further overturned provisions of the District's gun laws. In the 111th Congress, pro-gun Members of the Senate amended the DC voting rights bill (S. 160) with language similar to the House bill (described above) and passed that bill on February 26, 2009. [...] The House Committee on Financial Services reported a bill (H.R. 3045; H.Rept. 111- 277) that includes a provision that would prohibit public housing authorities from barring tenants from possessing firearms. And the Senate Judiciary Committee approved amendments (S. 1132) to the Law Enforcement Officers Safety Act (LEOSA; P.L. 108-277), which authorizes certain qualified police officers to carry concealed firearms across state lines. [...] Several committees have held congressional hearings on gun trafficking and smuggling across the Southwest border from the United States to Mexico. The Consolidated Appropriations Act, 2010 (P.L. 111-117), includes increased funding for Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) to investigate additional gun trafficking cases. Other salient and recurring gun control issues for the 111th Congress could include (1) denying firearms and explosives to persons watch-listed as known or suspected terrorists, (2) retaining Brady background check records for approved firearm transactions to enhance terrorist screening, (3) more strictly regulating certain long-range .50 caliber rifles, (4) further regulating certain firearms previously defined in statute as 'assault weapons,' and (5) requiring background checks for private firearm transfers at gun shows."
CRS Report for Congress, RL32842