FILE - In this Friday, Dec. 14, 2012 file photo, parents leave a staging area after being reunited with their children following a shooting at the Sandy Hook Elementary School in Newtown, Conn., where Adam Lanza fatally shot 27 people, including 20 children. The Republican-led Senate voted Wednesday, Feb. 15, 2017, to block an Obama-era regulation that would prevent an estimated 75,000 people with mental disorders from being able to purchase a firearm. (AP Photo/Jessica Hill, File)
FILE - In this Friday, Dec. 14, 2012 file photo, parents leave a staging area after being reunited with their children following a shooting at the Sandy Hook Elementary School in Newtown, Conn., where Adam Lanza fatally shot 27 people, including 20 children. The Republican-led Senate voted Wednesday, Feb. 15, 2017, to block an Obama-era regulation that would prevent an estimated 75,000 people with mental disorders from being able to purchase a firearm. (AP Photo/Jessica Hill, File) Credit: Jessica Hill

WASHINGTON — Congress on Wednesday sent President Donald Trump legislation blocking an Obama-era rule designed to keep guns out of the hands of certain mentally disabled people. On a vote of 57-43, the Senate backed the resolution, just one of several early steps by the Republican-led Congress to undo regulations implemented by former President Barack Obama. The House had passed the measure earlier this year.

The Obama rule would have prevented an estimated 75,000 people with mental disorders from being able to purchase a firearm. It was crafted as part of Obama’s efforts to strengthen the federal background check system in the wake of the 2012 massacre of 20 young students and six staff at Sandy Hook Elementary School in Newtown, Connecticut.

Sen. Chris Murphy, D-Conn., said he didn’t know how he’d explain to his constituents Congress was making it easier, not harder, for people with serious mental illness to have a gun.