The conservative group Americans for Prosperity, backed by the billionaire industrialist Koch Brothers, floated spending cut proposals on Monday totaling about $45 billion.
The White House said it is sending the so-called rescissions package to lawmakers Tuesday.
Senior administration officials said that Tuesday's package is expected to be the first of several, as part of a broader effort to curb needless spending.
However, while the House looks apt to approve the package ― which would cut roughly $7 billion from the Children's Health Insurance Program (CHIP), $4.3 billion from a government vehicle loan program and more than $100 million in unspent funds to address Hurricane Sandy damage ― the White House said it looked forward to having a "conversation" with the Senate.
If enacted by Congress, the so-called rescission package would take spending authority off the table so those funds can't be tapped by lawmakers for other uses in the future.
For instance, more than $4 billion in cuts to a loan program created to boost fuel-efficient, advanced-technology vehicles wouldn't result in fewer loans since the loans are no longer being made.
$252 million in excess funds remaining from the 2015 Ebola outbreak response, an epidemic the World Health Organization declared to be over in 2016.
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Congress regularly rescinds CHIP funds, including nearly $7 billion in the fiscal 2018 omnibus spending law, but typically uses the money to pay for other health-related priorities.
The $7 billion spending cut to CHIP was proposed because those funds "are no longer necessary or can't be spent because the authority to do so expired past year", the release said. "The only thing it would be used for is offsets down the line". But some Democrats howled over the Trump proposal anyway.
Meanwhile, Democrats will likely oppose these first cuts, particularly because they go after the CHIP program.
The White House and Tea Party lawmakers upset by the budget-busting "omnibus" bill have rallied around the plan, aiming to show that Republicans are taking on out-of-control spending.
Numerous cuts are to spending that the Office of Management and Budget has deemed unnecessary, unused, or can not be used for its original objective.
Democrats in the House and Senate were withholding judgment on Trump's scaled-back cuts, pending more details.
McCarthy wants to succeed soon-to-retire House Speaker Paul Ryan, R-Wis., and some of his allies view the project as a way to improve his standing with fractious GOP conservatives who blocked his path to the speakership in 2015. They argued that it would be breaking a bipartisan budget pact just weeks after it was negotiated.
"Washington has a spending problem", Russ Vought, deputy director of the White House Office of Management and Budget said in a White House release.