Iran conflict has led to concern in Congress, White House that US may struggle to respond to another crisis in the near future.

Trump invokes the Defense Production Act to boost US munitions output, waive regulations on critical minerals, and hold defense contractors accountable.

The conflict has spurred fears that the US has stretched its resources, drawing down supplies of critical munitions.

President Donald Trump recently invoked the Defense Production Act as a means to bolster the country's critical munitions and supply lines.