KEY POINTS
  • Senate Majority Leader Mitch McConnell says the Senate will vote Thursday on whether to block President Donald Trump's emergency declaration over border wall funding.
  • Four Republicans are set to join 47 Democrats to pass the measure, though Trump plans to veto it.
  • McConnell says Republicans are looking at ways to limit the president's power in declaring national emergencies in the future.
Senate Majority Leader Mitch McConnell (R-KY) talks to reporters with Senate Majority Whip John Thune (D-SD) (R) following the weekly Senate Republican policy luncheon at the U.S. Capitol March 05, 2019 in Washington, DC.

The Senate will vote Thursday on whether to block President Donald Trump's national emergency declaration, forcing Republicans to decide if they should check the White House's flex of executive power.

The Democratic-held House has already approved a resolution to terminate Trump's action, which he aims to use to secure $3.6 billion to build his proposed border wall. The GOP-held Senate is expected to pass the measure, as at least four Republicans currently plan to support it.