WASHINGTON — The Senate resoundingly approved a border security compromise Thursday that ignores most of President Donald Trump’s demands for building a wall with Mexico but would prevent a new government shutdown. The White House said Trump would sign it but then declare a national emergency and perhaps invoke other executive powers to try to shift money to wall-building from elsewhere in the federal budget.

Congress’ Democratic leaders, Speaker Nancy Pelosi in the House and Chuck Schumer in the Senate, quickly branded such a presidential declaration “a lawless act, a gross abuse of the power of the presidency and a desperate attempt to distract from the fact that President Trump broke his core promise to have Mexico pay for his wall.”

House passage and Trump’s signature were assured for the basic spending bill compromise, which for now would stamp a bipartisan coda on a nasty melee that’s dominated the initial months of power sharing in Washington.

The specter of the national-emergency declaration has produced widespread opposition in Congress, but Trump is under pressure to soothe his conservative base and avoid looking like he’s surrendered in his wall battle with Congress.

At the White House, Press Secretary Sarah Sanders said Trump would sign the bill and take “other executive action, including a national emergency.” She added, “The president is once again delivering on his promise to build the wall, protect the border, and secure our great country.”