"The president is essentially abandoning many people the economy has left behind - a large number of whom voted for him - and is pursuing policies that would make their lives more hard than they already are", said Robert Greenstein, president of the left-leaning Center on Budget and Policy Priorities.
"Almost every president's budget proposal that I know of is basically dead on arrival", Sen.
Mulvaney pitched the $4.1 trillion budget proposal as reflecting the interests of taxpayers who want their money properly spent. They are not bills that are sent to the President to be signed into law. By proposing disproportionate cuts on a relatively small slice of the budget - a part of the budget already projected to shrink as a share of GDP - the proposed deficit reduction fails the test of broadly shared trade-offs and sacrifices. The program allows veterans to seek outside medical care from private doctors.
The budget leaves Medicare spending untouched.
The White House's proposed budget would deprive millions of Americans from health care, food stamps, student loans and disability benefits. Chuck Schumer, D-New York, the minority leader.
"The budget provides for the President's target of United States dollars 1 trillion in infrastructure investments, that will be met with a combination of new Federal funding, incentivised non-Federal funding, and expedited projects that would not have happened but for the Administration's involvement (for example, the Keystone XL Pipeline)", the White House said.
Congress' key constitutional role is its power of the purse.
The nitty gritty of how much each agency will get for various federal programs will be decided by members of the House and Senate appropriations committees. But Democrats as well as everyone else understood that tax cuts meant government spending cuts would be needed.
This year, the GOP will use the budget process to smooth passage of one if its top policy goals - restructuring the tax code. "I think that's maybe the reason why they would put it out in this kind of format". Medicaid cuts of $610 billion would come alongside $250 billion savings - partly fueled by limiting expanded Medicaid - from repealing Obamacare.
Thus far, the president's proposal has received tough criticism as it appears to break Trump's campaign promise to not cut funding for Medicaid.
House Speaker Paul Ryan stopped short of embracing the administration's budget projections.
But not all House Republicans heeded that call. Asked about the impact on his constituents from reductions in such programs as food stamps, Rogers said, "These cuts that are being proposed are draconian".
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".
"To avoid loading our children and grandchildren with unsustainable levels of debt, the budget includes Dollars 3.6 trillion in spending reductions the most proposed by any President in a budget to reach balance within 10 years". It would also force some people on Social Security's disability program back into the workforce.
But "it's a proposal whose time has come", Spoehr said, given US budget deficits and high military spending overall. "For this budget to work, you need a time machine to take us back to the 1990s".
There is, however, a new $19 billion for a paid family leave program for new parents backed by the president's daughter, Ivanka Trump. "And the message is from the President to the Congress saying, 'Here's what my priorities are". Republicans did the same to Democrats throughout the Obama years, repeatedly forcing Democrats - especially moderates - to embrace parts of Obama's budget Republicans considered out of step with their voters.
-The Disabled: Trump's budget calls for cutting Social Security disability benefits by almost $70 billion over the next decade by encouraging and, in some cases, requiring people receiving the benefits to re-enter the workforce.
The President's approval ratings in many key swing districts across the country are low.
Congress ultimately controls the government purse strings and may reject some or numerous Trump administration's proposals.