Defense Secretary Ash Carter has said he had opposed commuting the prison sentence of convicted leaker Chelsea Manning, who was convicted in 2013 of espionage and other crimes for leaking classified information while deployed in Iraq.
"That was not my recommendation," Carter said. "I recommended against that, but the president has made his decision."
Carter declined to elaborate on his view.
President Barack Obama has drawn intense criticism from members of Congress and others for his decision Tuesday to commute Manning's 35-year prison sentence to about seven years, including the time she spent locked up before she was convicted. Her sentence is now set to expire 17 May.
At the time Manning committed the crimes she was known as Bradley Manning and was serving as an Army private.
A judge convicted Manning of 20 counts, including six Espionage Act violations, theft and computer fraud. She was sentenced to 35 years out of a possible maximum of 90. She was acquitted of the most serious charge of aiding the enemy, which carries a possible life sentence.
The now 29-year-old native of Crescent, Okla., leaked more than 700,000 classified Iraq and Afghanistan war logs and diplomatic cables in 2010 while working as an intelligence analyst in Baghdad.
Manning also leaked a 2007 video clip of a US helicopter crew killing at least nine men, including a Reuters news photographer and his driver. The Pentagon later concluded the helicopter crew acted appropriately, having mistaken the camera equipment for weapons.
At a White House news conference yesterday, Obama firmly defended his Manning decision, arguing she had served a "tough prison sentence" already.
The White House declined to comment on Carter's remarks but pointed to Obama's explanation about why he'd granted the commutation.
Obama said his decision took into account the fact that Manning had gone to trial, taken responsibility for her crime and received a sentence that he said was harsher than other leakers had received. He emphasized that he had commuted her sentence, not granted a pardon, which would have symbolically forgiven her for the crime.
"I feel very comfortable that justice has been served," Obama said, adding, "A message has still been sent that when it comes to our national security, that wherever possible we need folks who may have legitimate concerns about the actions of government or their superiors or the agencies in which they work, that they try to work through the established channels and avail themselves of the whistleblower protections that have been put in place."
The president said he does not accept the argument of critics that the commutation sends the wrong message to others in the military.
"The notion that the average person who was thinking about disclosing vital, classified information would think that it goes unpunished, I don't think would get that impression from the sentence that Chelsea Manning has served," Obama said.