WASHINGTON - US President Donald Trump's new $1.15 trillion budget would reshape America's government with the broad, conservative strokes he promised as a candidate, ordering generous increases for the military, slashing domestic programs and riling both fellow Republicans and Democrats by going after favored programs.

The president's initial budget proposal, submitted to Congress on Thursday, would boost defense spending by $54 billion, the largest increase since Ronald Reagan's military buildup of the 1980s. That means deep cuts elsewhere - the environment, agriculture, the arts - but Trump said that's imperative to take on the Islamic State group and others in a dangerous world.

"To keep Americans safe, we have made the tough choices that have been put off for too long," he declared in a statement titled "America First" that accompanied the budget.

Or, as Budget Director Mick Mulvaney said, "This is a hard-power budget, not a soft-power budget."

It's not entirely in line with Trump's campaign pledges.

It would make a big down payment on the US-Mexico border wall, which Trump repeatedly promised the Mexicans would pay for. American taxpayers will, at least for now. Thursday's proposal calls for an immediate $1.4 billion infusion with an additional $2.6 billion planned for the 2018 budget year starting Oct 1.

Parts of Trump's spending plan for the next fiscal year angered both congressional Democrats and Republicans who will have the final say on it.

While it targets Democratic priorities like housing, community development and the environment, it also would slash GOP sacred cows like aid to rural schools and subsidized airline service to Trump strongholds, and it would raise fees on participants in the federal flood insurance program.

The budget pursues frequent targets of the GOP's staunchest conservatives, eliminating the National Endowment for the Arts, legal aid for the poor, low-income heating assistance and the AmeriCorps national service program established by President Bill Clinton.

But Midwestern Republicans, including Sen Rob Portman of Ohio, were upset by cuts to the Great Lakes Restoration Initiative. Southern Republicans like Rep Hal Rogers of Kentucky lashed out at cuts he called "draconian, careless and counterproductive."

One target of the budget is the Appalachian Regional Commission, which helps communities in the region.

Trump's proposal covers only roughly one-fourth of the approximately $4 trillion total federal budget. This is the discretionary portion that Congress passes each year, not addressing taxes, Social Security, Medicare and Medicaid.

Nor does it make predictions about deficits and the economy. Those big-picture details are due in May, and are sure to show large - probably permanent - budget deficits. Trump has vowed not to cut Social Security and Medicare and is dead set against raising taxes.

As for Thursday's proposal, Republicans praised the president for beefing up the Pentagon, but they were far less enthusiastic about accepting Trump's recipe for doing so without adding to the nation's $20 trillion debt.