WASHINGTON — President Trump is calling on Congress to pull back $15 billion in spending, including on the Children’s Health Insurance Program.

Almost half of the proposed cuts would come from two accounts within CHIP that White House officials said expired last year or are not expected to be drawn upon.

An additional $800 million in cuts would come from funds created by the Affordable Care Act in 2010 to test innovative payment and service delivery models.

If approved by Congress, the reductions would represent less than 0.4 percent of total government spending this year. A senior administration official said this was the biggest rescission request that has ever been sent to Congress.

White House officials and Republican leaders say this package of proposed cuts could begin to signal to conservatives that they are now taking steps to reverse a free-spending fiscal approach they have embraced since Trump took office.