It was a steep hill to climb for opponents of Trump's national emergency as the House would have needed two-thirds of its members to back the veto override.
In a rare rebuke of Trump from Congress, both the House and Senate passed a resolution last month to block the president from declaring the emergency and bypassing Congress to secure billions for his border wall.
Just days after Attorney General William Barr announced that special counsel Robert Mueller had found Trump didn't scheme with Russian Federation to help his 2016 election, Tuesday's vote bolstered Trump's drive to build a wall along the boundary with Mexico, a hallmark of his 2016 presidential campaign and a priority of his presidency.
The House and Senate had voted earlier to disapprove Trump's plan to use an emergency declaration to divert military funds to build the wall.
Congress, to which the Constitution assigned control over spending, voted weeks ago to provide less than $1.4 billion for barriers.
But their veto override attempt seems certain to fall short of the two-thirds majority they will need to succeed later Tuesday.
Conway--husband of White House counselor Kellyanne Conway--writes that "it was always virtually unimaginable that collusion, so defined, would ever be found" and the ultimate finding on that issue "was bound to become a straw man for President Trump and his supporters to knock down with glee".More news: Five million sign petition urging UK to revoke Article 50
However, the National Emergencies Act does allow Democrats to bring up another disapproval resolution six months from now, something House Democrats are actively considering.
The chamber voted 248-181 in favour of overriding Trump's veto. A coalition of 16 states sued in federal court in February to stop Trump's border wall emergency; another four states joined the lawsuit this month. "Today's vote simply reaffirms Congressional Democrats are the party of Open Borders, Drugs and Crime!"
The emergency declaration would let Trump shift an additional $3.6bn from military construction projects to erecting barriers along the border with Mexico.
In his 2018 memo to Rosenstein, Barr argued that a president can not obstruct justice as long as he legitimately exercises his constitutional powers.
"This emergency declaration is nothing more than an end run around a majority - a bipartisan majority - of both the House and the Senate in complete disregard of our constitutional system of separation of powers", said Representative Peter DeFazio, an Oregon Democrat.
In floor debate ahead of the vote Tuesday, Democrats insisted Trump was violating the Constitution's separation of powers, while Republicans argued he was acting within his authority under the National Emergencies Act to address a genuine crisis at the southern border.
Trump's declaration was the 60th presidential emergency under that statute, but the first aimed at spending that Congress explicitly denied, according to New York University's Brennan Center for Justice, which tracks the law.