From Guns.com:

The legislation, backed by Dems in both the House and Senate, would encourage more states to adopt licensing schemes like Connecticut’s handgun purchasing law, which requires a special renewable permit to purchase any revolver or pistol. Dubbed the Handgun Purchaser Licensing Act, the bill was introduced by U.S. Sen. Chris Van Hollen of Maryland and Senators Richard Blumenthal and Chris Murphy of Connecticut along with U.S. Reps. Jahana Hayes, D-Conn and Jamie Raskin, D-Md.