The provision would follow a recommendation of military prosecutors to clarify what they view as an oversight in the 2006 law that created the commissions. The law did not make clear if guilty pleas would be permitted in capital cases. Federal civilian courts and courts in most states with capital-punishment laws permit such pleas…

“They are trying to give the 9/11 guys what they want: let them plead guilty and get the death penalty and not have to have a trial,” said Maj. David J. R. Frakt of the Air Force, a Guantánamo defense lawyer…

Cmdr. Suzanne M. Lachelier, a Navy lawyer for one of the detainees in the Sept. 11 case, Ramzi Bin al-Shibh, said of the Obama administration, “They’re encouraging martyrdom.”