"When the government cuts taxes, it collects less money".
At the same time, the blueprint boosts spending for the military by tens of billions and calls for $1.6 billion for a border wall with Mexico that Trump repeatedly promised voters the US neighbor would finance. He calls it "immoral".
The rates baked into Trump's budget "seem low given the growth rate, and there are implications", Goldwein said. "It dismantles our nation's basic living standards", she said.
Donald Trump's budget chief is defending the president's plans to cut social programs as a means to increase economic growth to 3 percent and put "taxpayers first".
He said the spending plan was "simply ludicrous".
"This budget presumes a Goldilocks economy" that never goes into recession, Sanford said. The food stamp program also would be cut, with millions of people dropping off of the rolls of this life-saving program that many families rely on to feed their children.
Leading the defense of the president's plan is Mick Mulvaney, the director of Office of Management and Budget and a former congressman elected in the 2010 tea party wave.
-The Great Lakes and the Chesapeake Bay: Trump's budget would eliminate the Great Lakes Restoration Initiative and the Chesapeake Bay Program, saving $427 million next year. "This is the budget you write if you think working families have it too easy", said Sen.
"It sends all of the right signals for the first time in almost a decade - a budget that actually is focused on the best interests of the American taxpayer rather than what's popular in Washington", he said.
"It cuts Social Security, decimates Medicaid and ends the Children's Health Insurance Program (CHIP) - it is an extreme document that reads like a wish list of special interest giveaways and is riddled with broken promises", he said.
"It's really hard to say - we are going through a prototype process and we've not decided if one size fits all", Mulvaney said, and told lawmakers the administration will determine the type of wall necessary for each part of the border.
Another $250 billion in cuts are proposed in reforms aimed at transitioning away from the Affordable Care Act.
Independent economists say the budget relies on unrealistic projections of economic growth, but Ryan sidestepped that question, saying faster growth would "help so many of our problems".
Some Republicans in Congress cheered Trump's budget. "This budget - and you know this - it will push millions of people into poverty and over the edge".
A day after releasing a budget that would dramatically slash the social safety net, President Trump's top budget official faced a bipartisan backlash on Capitol Hill. The Supplemental Nutritional Assistance Program (SNAP), which is a food subsidy, will be re-tooled or, in administration speak, "reformed" over the next two years and cut by roughly $7.6bn.
"You have this perverse incentive effect going on, because the work requirements have been decimated", Kudlow said of Clinton-era policies that weaned people off government payments.
And even while decrying the large cuts in the president's budget, which longtime GOP Rep. Hal Rogers of Kentucky deemed "draconian", GOP lawmakers were also expressing frustration that Trump was leaving Social Security and Medicare largely intact - another area where Trump's goals stand in conflict with those of congressional Republicans.
Republican Representative Tom Cole, who represents an Oklahoma district that the Almanac of American Politics described as "countrified", predicted "Congress would look at some of those things differently" from the Trump administration's budget.
-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.
Congress ignored Trump's call for deep cuts in federal programs when it passed a budget for the last five months of the 2017 fiscal year in early May, funding the government largely at 2016 levels.
The proposed budget, for the fiscal year that begins October 1, was being delivered to Congress Tuesday, setting off an extended debate in which Democrats are already attacking the administration for trying to balance the budget on the backs of the poor. It is Congress that makes appropriations.