Lawmakers face a looming fight over whether or not to green light an effort to replace the $3.6 billion in military construction funding that the administration shifted toward the border wall as part of Trump's emergency declaration.

The Senate defense bill "back fills" the funding, while the House bill does not. Democrats are fuming over Trump's decision to leapfrog Congress and shift the military funds toward the wall.

"The House already voted this down. Democrats, myself, Speaker Pelosi, Chairwoman Lowey, and Ranking Member Leahy, have been crystal clear: we are not going to bless the president stealing money from the military by backfilling it later. This would render the Congress toothless, and the appropriations process meaningless," Senate Minority Leader(D-N.Y.) said on Wednesday.