Congress can veto Mr Trump's veto, but it does not look likely that they will have the necessary votes to do so. Trump was surrounded in the Oval Office by supporters who offered profuse thanks and frequent applause. Trump issued a veto on Friday, preventing Congress's attempt to terminate his national emergency declaration seeking to circumvent lawmakers and appropriate billions of dollars for his southern border wall.
While Congress is unlikely to muster the votes to override the veto, the rebuke from some members of his own party left Trump politically wounded, at least temporarily, as immigration and his planned wall along the USA southern border become a flashpoint again in the 2020 presidential campaign.
The president had threatened a veto of the resolution. But for those who broke from party ranks to vote for the termination resolution, the president said they were "doing what they have to do", adding that he did not pressure them for their vote. The vote to cancel Trump's border emergency, which would allocate $3.6 billion more on border barriers than Congress had allowed, passed 59-41.
"The world continues to be a unsafe place and we'll continue in the war against terrorism", said the senator.
Thursday's vote was the first direct challenge to the 1976 National Emergencies Act, just as a Wednesday vote on Yemen was the first time Congress invoked the decades-old War Powers Act to try to rein in a president.
Republicans, Pelosi said, "will have to choose between their partisan hypocrisy and their sacred oath to support and defend the Constitution".
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Mr Trump had declared the emergency in February after Congress refused his requests for $5.7bn (£4.4bn) to construct a border wall - a campaign promise.
Recent months have seen a surge in unauthorized crossings of the US border with Mexico.
Sen. Thom Tillis, R-N.C., had said he would oppose the declaration but reversed course on the Senate floor, saying that he was "sympathetic" to Trump's push to deal with the crisis at the border.
Trump insists he's on solid legal ground, however.
"I think the basic premise of Mike [Lee's] bill is correct", Republican Senator Jerry Moran said Thursday. "They shouldn't even be suing, but they will because they always do".