WASHINGTON (CNN) -- President Donald Trump's first budget proposal will look to increase defense and security spending by $54 billion and cut roughly the same amount from non-defense programs, the White House said Monday.

"This budget will be a public safety and national security budget," Trump said at a bipartisan gathering of US governors at the White House Monday, vowing substantial increases in defense, law enforcement and infrastructure spending.

The majority of "lower priority programs and most federal agencies" will see a reduction in their budget as a result of the proposal, according to an official at the Office of Budget Management speaking with reporters on background.

The official said those cuts will come through "unauthorized programs" and places "where there is duplication, where consolidation needs to occur."

Few details were provided on how the cuts will be made and over what time period they will be implemented. Multiple officials, however, have made clear over the last 48 hours that the Environmental Protection Agency and foreign aid will be cut significantly under the new plan.

The budget, one OMB official said, expects "the rest of the world to step up in some of the programs this country has been so generous in funding" over the years.

Foreign aid makes up roughly 1% of the federal budget and includes a host of programs meant to help implement national security policy. While foreign aid has long been a target for conservatives, cuts to these programs are unlikely to get the Trump administration close to the $54 billion in proposed overall cuts.

The budget blueprint, which will outline in the clearest terms to date what Trump's policy priorities will be as president, fits with Trump's pledges to increase defense spending and cut government waste as a candidate.

Congress is not mandated to follow Trump's budget plan and in the coming weeks Republicans on Capitol Hill are expected to call administration officials to Congress to explain their proposal. The administration will also work with agencies to figure out how they will focus on cuts to their funding.

Trump said throughout the 2016 campaign that he would focus on spending cuts and tax reform, rhetoric that helped woo Republicans who questioned his commitment to other conservative principals.

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