A plan being drafted for closing the Guantanamo military jail will call for the transfer to U.S. prisons of possibly dozens of inmates deemed too dangerous to release, President Barack Obama's counterterrorism adviser said, setting up a fight with congressional opponents.

Outlining the White House proposal that will soon be sent to Congress, Lisa Monaco, one of Obama's top national security aides, told the Aspen Security Conference on Saturday that the United States would step up the transfers of 52 detainees cleared for resettlement in other countries.

The plan calls for the rest of the inmates at the U.S. naval base in Cuba to be brought to the United States to "Supermax" or military prisons for trials or continued military detention, Monaco said. Some 116 detainees remain at Guantanamo, many held more than a decade without charge or trial.