That led Trump to declare a national emergency to bypass Congress and tap funds already allocated for other projects to build the wall.
Donald Trump is on Monday expected to request an extra $8.6 billion (£6.6 billion) to fund his border wall with Mexico, setting the scene for another showdown with Democrats as he continues to attempt to fulfill his signature campaign pledge.
It also seeks to slash $327bn from food and housing assistance services, and to reduce funding for environmental protections and foreign aid programmes.
The request faces a steep uphill battle as Democrats, who oppose the wall as unnecessary and immoral, control the House, making the request's passage unlikely.
Schumer and Pelosi, in a joint statement preempting the budget request, said "President Trump hurt millions of Americans and caused widespread chaos when he recklessly shut down the government to try to get his expensive and ineffective wall, which he promised would be paid for by Mexico". Fresh off the longest government shutdown in history, his 2020 plan shows he is eager to confront Congress again over the wall. "The same thing will repeat itself if he tries this again". The one-time allocation is championed by the president's daughter Ivanka Trump.
Congress also will challenge the idea that the 2020 budget top line is growing while the US military presence in Afghanistan and Syria is shrinking, noted Travis Sharp, of the Center for Strategic and Budgetary Assessments.
Without those overly rosy assumptions, the national debt would likely be $2 trillion higher by 2029, according to an analysis by the Committee for a Responsible Federal Budget (CRFB), a nonpartisan group that advocates for balanced budgets.
The White House on Monday proposed capping out-of-pocket prescription drug expenses for seniors covered by Medicare, re-emphasizing Trump administration support for a concept endorsed both by pharmaceutical companies and congressional Democrats. The president has resisted big, bipartisan budget deals that break the caps - threatening to veto one previous year - but Congress will need to find agreement on spending levels to avoid another federal shutdown in fall.
Trump would have to issue his first veto, and neither the House nor the Senate appears to have the two-third majority needed to override it.
Trump lost the first round in his battle with Congress over wall construction money, with lawmakers rejecting any appropriation for the wall, while offering almost $1.4 billion in money for barriers. He proposes boosting defense dollars but shifting some of it to a contingency account that doesn't count toward budget caps.
"President Trump's budget takes steps in the right direction, but there is still much work to do", said Steve Womack, a Republican from Arkansas who sits on the House Budget Committee.
But Kudlow said he was not anxious by some predictions the American economy will only advance a little in the first three months of this year and not much more than 2 percent this year.
"We need the wall and it has to be built and we want to build it fast", Trump said. Trump has proposed $291 million in increased spending to eliminate new HIV infections in the United States, he has also called for a 22 percent cut to PEPFAR, according to the Associated Press.
The proposal will also include $1 billion for a child-care fund that would seek to improve access to care for underserved populations, a White House official confirmed.
Other ideas, however, are more likely to gain traction - like the administration's request for almost $300 million to combat HIV/AIDS and lower new transmissions of the disease by 90 percent within a decade.
White House Economic Adviser Larry Kudlow touts major progress in the ongoing trade talks with China. "This is for research and development and procurement to fund the most awe-inspiring military", Vought said. And that's despite numerous promises that Trump made not to cut funding for programs that take of the poor and elderly. He used to say Mexico would pay for it, but Mexico has refused to do so.