AP Photo/Ross D. Franklin
"In my opinion, Hillary did what she should have done," Clinton said.
The attacks occurred when Hillary Clinton was secretary of state and the Obama administration's handling of the incident has been heavily criticized by Republicans.
Moderator Gwen Ifill then pressed Clinton for his thoughts on a new select congressional committee established by House Republicans earlier this month. Clinton quipped that she wanted him to get into a "political fight."
"I'm not doing that. I'm not running for anything," said Clinton.
He went on to encourage observers and other members of the Obama administration to view the investigation as a politicized attack.
"My advice to everyone involved, not be defensive, realize what this is," Clinton said.