WASHINGTON — An effort to ramp up U.S. weapons production and build more ships, planes and drones will require a massive upfront investment, President Donald Trump’s budget director told a House committee Wednesday.

The testimony from Russell Vought jump-starts the White House’s push to increase defense spending to nearly $1.5 trillion in the next budget year, up from nearly $1 trillion this year, while cutting health research, heating assistance and scores of other domestic programs by about 10% overall. Such cuts do not cover mandatory spending, which includes such programs as Social Security and Medicare.

The debate over Trump’s proposal underscored the sharp divide that will shape some of the most significant policy debates going into a midterm election that will give voters the ultimate say on the direction of the country.

“For the industrial base to double or triple and build more facilities, not just add shifts, it requires multiyear agreements to purchase into the future,” Vought told lawmakers. “That cost has to be booked in this first year.”

The White House is calling for about $1.1 trillion for defense through the regular appropriations process, which typically requires support from both parties for approval. An additional $350 billion would come through a separate bill that Republicans can accomplish on their own, through party-line majority votes.