Environment: President Trump targets rules on vehicle emissions.

WASHINGTON — President Trump’s budget blueprint for the coming fiscal year would slash the Environmental Protection Agency by 31 percent and cut State Department spending by a similar amount in a brash gesture of disdain for big government, according to congressional staff members familiar with the plan.

The budget outline, to be unveiled Thursday, is more of a broad political statement than a detailed plan for spending and taxation. But it represents Trump’s first real effort to translate his broad but vague campaign themes into the black and white of spending priorities. The president would funnel $54 billion in additional funding into defense programs, beef up immigration enforcement and significantly reduce the nondefense federal workforce to “dismantle the administrative state,” in the words of Trump’s chief strategist, Stephen Bannon.

Yet for all its headlinegrabbing bold strokes — and the White House claims that it will reset the process of Washington policymaking — major elements of the plan have already been declared dead on arrival by the Republican leadership in Congress, and much of the fiscal fine print will be filled in by Capitol Hill lawmakers and their aides over the next month.

House appropriations subcommittees began reviewing the plan late Wednesday. Among the cuts: drastic reductions in the 60-year-old State Department Food for Peace Program, which sends food to poor countries hit by war or natural disasters, and the elimination of the Department of Transportation’s Essential Air Service program, which subsidizes flights to rural airports.

Trump’s team also is expected to propose a wide array of cuts to public education, to transportation programs like Amtrak and to the Department of Housing and Urban Development, including the complete elimination of the $3 billion Community Development Block Grant program, which funds popular programs like Meals on Wheels.