Republican Sen. Lisa Murkowski of Alaska, who sits on the Senate Energy and Natural Resources Committee, calls the measure "a stunning attack" on the state's ability to exploit energy resources.
But for the administration, the risks associated with the energy industry are just too great.
"Unfortunately, accidents and spills can still happen, and the environmental impacts can sometimes be felt for many years," reads a blog post from the White House.
According to the Fish And Wildlife Service, ANWR is home to "some of the most diverse and spectacular wildlife in the arctic" - including 37 land mammals, eight marine mammals, 42 species of fish, and more than 200 birds species.
For a list of unique species in the region, visit the refuge's website here.