Sens. John McCain, Lindsey Graham and Kelly Ayotte (R-N.H.) called for accountability.
Dempsey said groups involved are not covered by the Authorization for Use of Military Force.
The revamped policy prohibits arms transfers “that may be destabilizing or dangerous."
Lieberman said he didn't see a coherent U.S. strategy on Syria, Iraq and Libya.
“I believe that groups loosely associated with al Qaeda were” involved, she told The Hill.
Molly K. Hooper 01/12/14 06:00 AM EST
The top House investigator will pursue several probes in likely his last year in the post.
The Obama administration on Friday named three Ansar al-Sharia groups as terrorist organizations and said two of them had carried out the 2012 terrorist attack in Benghazi, Libya.
Snowden's leaks have prompted terrorists to change their tactics, the report states.
A spokeswoman for Rep. Dutch Ruppersberger (D-Md.) told The Hill that he was recovering from knee surgery.
The hearing will address "the Administration’s counterterrorism rhetoric.”