She called the administration's projections of three percent annual growth "really not possible - they have impossible assumptions of no changes in revenue and tax cuts".
"We're not going to measure our success by how much money we spend, but how many people we actually help", Mulvaney said.
"This is the first time that an administration has written a budget through the perspective of the people paying the taxes", Mulvaney told reporters Monday night. "If you are on food stamps and you are able-bodied, we need you to go to work".
Military aid to Israel and Egypt, two close US allies in the Middle East and the biggest recipients of USA military assistance, will remain unchanged, Mulvaney said. A month earlier, over 120 retired USA generals and admirals wrote a letter to Congress, urging them to fully fund us diplomacy and foreign aid because "elevating and strengthening diplomacy and development alongside defense are critical to keeping America safe".
Like the American Health Care Act (AHCA) passed earlier this month by the Republican-controlled House of Representatives, Trump's budget plan would put an end to Medicaid as a guaranteed benefit based on need, replacing it with per capita funding or block grants to the states.
The budget would also impose a 2 percent cut to all spending that must be approved by Congress each year for the next decade, excluding military programs.
Food aid, in particular, would be scaled back.
"This proposal will free States to advance solutions that best serve their unique populations - for example, encouraging work, promoting personal responsibility, and meeting the spectrum of diverse needs of their Medicaid populations", according to the budget document.
Seven of the 10 states receiving the most food stamp assistance are states Trump carried in November.
While the health budget includes proposals to sharply cut research at the National Institutes of Health, shrink Medicaid by billions of dollars, and reduce many other programs, drugmakers appear to be spared. The administration says those credits should be given only to families who are in the country legally, even if the children - but not the parents - are American citizens. Many Democrats have also opposed the steep cuts to non-defense discretionary spending in the budget. They're going to increase defense spending.
FINANCIAL REGULATION - Two Wall Street financial regulators, the Consumer Financial Protection Bureau and the Securities and Exchange Commission, would face cuts or major structural changes under Trump's budget proposal.
The tax cuts would particularly benefit the wealthiest Americans, as Trump has proposing cutting the estate tax, capital gains and business tax rates. But Mulvaney acknowledged the House health care bill, which the president supports, would do that. A White House official said that is because the military is still planning spending priorities for those years and that the budget would eventually change.
In fairness to Trump, he promised on the campaign trail not to cut Medicare (or Social Security), and this budget delivers on that promise.
Some 10.6 million people with serious and long-lasting medical impairments receive Social Security Disability Insurance. He argued Trump can get millions of people off of government aid and back to work.
Sen. Chuck Schumer, D-N.Y., says the budget would harm many Trump supporters, but he's optimistic it will be roundly rejected.
And it's not just Democrats who have spoken out.
The proposed budget "would be a travesty for patients and the future of personalized medicine if enacted", said Edward Abrahams, president of the Personalized Medicine Coalition, which represents patients, insurers, health care providers, and others. It's also the biggest source of federal funding for states. With Trump pledging to increase the Navy fleet to 350 ships from 275 that can be deployed today, the Navy has said it will need to request 12 new vessels in fiscal 2018 to start the acceleration. He promises a new parental leave program championed by his daughter Ivanka, but will fall short on his promises for a massive tax cut.
-The Poor, Part III: Trump's budget would cut funding for the Temporary Assistance for Needy Families (TANF) program by $22 billion over the next decade.
On the campaign trail and after taking office, Trump repeatedly criticized the drug industry.