House Democrats filed a measure to block President Donald Trump's national emergency declaration to build a wall at the southern border.
According to The Associated Press, a staff aide introduced the resolution during a pro forma session of the House Friday.
From here, it will likely pass a vote in the Democratic-run House next week. The measure's sponsor, Rep. Joaquin Castro, told reporters Friday he has support from more than 220 co-sponsors, including one Republican.
The resolution will then head to the Republican-controlled Senate. If it passes there, it will go to the president, who is likely to veto it. If that were to happen, a two-thirds majority in both the House and the Senate would be needed to override the veto.
President Trump has been hit with several legal challenges since declaring a national emergency. The declaration allows the president to access certain government funding to pay for a border wall without going through Congress.