Washington—Senator Markey joined Senator Dianne Feinstein (D-Calif.) and 25 Senate colleagues today filed an amendment to the Commerce, Justice, Science Appropriations bill to give the Justice Department additional discretion in how it uses appropriated funds to conduct background checks to keep guns out of the hands of known or suspected terrorists.

The amendment is cosponsored by Senators Patrick Leahy (D-Vt.), Bill Nelson (D-Florida), Harry Reid(D-Nev.), Dick Durbin (D-Ill.), Chuck Schumer (D-N.Y.), Barbara Mikulski (D-Md.), Barbara Boxer (D-Calif.), Cory Booker (D-N.J), Mark Udall (D-Colo.), Tom Carper (D-Del.), Ed Markey D-Mass.), Sheldon Whitehouse (D-R.I.), Robert Menendez (D-N.J.), Mark Warner (D-Va.), Tim Kaine (D-Va.), Chris Coons(D-Del.), Richard Blumenthal (D-Conn.), Patty Murray (D-Wash.), Bob Casey (D-Pa.), Sherrod Brown(D-Ohio), Kirsten Gillibrand (D-N.Y.), Angus King (I-Maine), Brian Schatz (D-Hawaii), Amy Klobuchar(D-Minn.), Christopher Murphy (D-Conn.) and Claire McCaskill (D-Mo.).

The amendment would give the attorney general the authority to block the sale of guns or explosives to known or suspected terrorists, if the attorney general has a reasonable belief that the weapons would be used in connection with terrorism. The amendment was modified from legislation introduced in February 2015 to ensure it adheres to Senate rules for amendments added to appropriations bills.

The amendment also includes language proposed by Senators Patrick Leahy (D-Vt.) and Bill Nelson(D-Florida) to ensure that anyone who has been the subject of a federal terrorism investigation in the past five years would be automatically flagged within the existing background check system for further review by the Justice Department.

Under current law, individuals who are known or suspected terrorists and do not fall into the one of the nine prohibited purchaser categories can legally purchase weapons. While the FBI is notified when individuals on the terrorist watch list apply for a background check through the National Instant Criminal Background Check system, it does not have the authority to block the sale.

According to the GAO, between February 2004 and December 2015, known or suspected terrorists initiated a background check to purchase a weapon 2,477 times—they successfully passed that check 2,265 times, or 91 percent.