"I think what he said was totally inappropriate, undisciplined," Clinton said at a news conference on Thursday, referring to Trump's claim that he could tell from the "body language" of his briefers that they were unhappy with President Obama.
"I would never comment on any aspect of an intelligence briefing I received," Clinton said.
But as a candidate for president in 2008, Clinton herself commented on a secret briefing, citing it twice in her criticism of the George W. Bush administration.
In a Feb. 25 speech, as a New York senator during the 2008 primaries, she said she had pushed the administration to provide information about their Iraq withdrawal plans.
"They didn't want to talk to us about it, as is their usual response," she said then. "We finally were able to secure a briefing which although classified, I can tell you was cursory. It did not inspire confidence in our readiness to do this important task of withdrawing our troops and equipment."