House Oversight Committee Chairman Rep. Darrell Issa, R-Calif., displays a letter of praise from President Obama to Gregory Hicks, former deputy chief of mission in Libya, number two in rank to slain U.S. Ambassador Christopher Stevens, during a House Oversight Committee hearing about last year's deadly assault on the U.S. diplomatic mission in Benghazi, Libya, on Capitol Hill in Washington, Wednesday, May 8, 2013. House Republicans insist the Obama administration is covering up information about the attack, rejecting administration assurances to the contrary and stoking a controversy with implications for the 2016 presidential race. (AP Photo/J. Scott Applewhite)WASHINGTON (AP) — Secretary of State John Kerry mentioned Thursday he's decided to reply to any questions related to the deadly assault on the U.S. diplomatic mission in Benghazi, Libya, because the Home Republican leader pushed for extra knowledge from the Obama administration.