President Donald J. Trump speaks during a meeting with members of his Cabinet, in the Cabinet Room of the White House March 8, 2018 in Washington, DC.

U.S. President Donald Trump will support a modest set of fixes to gun laws, stepping back from some of the more sweeping changes he had considered after the country's latest mass school shooting, senior officials told reporters on Sunday.

Opting for a plan the administration officials described as "pragmatic," Trump backs legislation proposed in Congress aimed at providing more data for the background check system — a database of people who are not legally allowed to buy guns.

More contentious proposals, such as raising the minimum age for buying guns to 21 from 18, or requiring background checks for guns bought at gun shows or on the internet, will be studied

by a commission headed by Education Secretary Betsy DeVos, the officials said.

The Justice Department will also provide an unspecified amount of grants to states that want to train teachers to carry guns in school - an idea already in place in a small number of states, and backed by the National Rifle Association gun rights lobby.

Trump has said he believes armed teachers would deter school shootings and better protect students when they happen.

The Wall Street Journal had reported on Sunday that the White House is expected to release a plan that will recommend states across the country to allow armed staffers in school, following last month's Florida school shooting that resulted in 17 deaths.

Trump has also backed a ban on "bump stocks," accessories that enable semi-automatic rifles to fire hundreds of rounds a minute. Bump stocks were used in the deadliest mass shooting in modern U.S. history, which took place in October in Las Vegas.

On Saturday, the Department of Justice formally submitted a regulation to ban bump stocks that would not need congressional approval.