GOP presidential candidate Rick Santorum slammed President Obama for apologizing to Afghans earlier this week for the recent burning of Korans at a U.S. military base this morning on "This Week."

"There was nothing deliberately done wrong here. This was something that happened as a mistake. Killing Americans in uniform is not a mistake, " said Santorum. "Say it's unfortunate…but to apologize for something that was not an intentional act is something that the president of the United States in my opinion should not have done."

Protests erupted in Afghanistan after the accidental burning and two American troops were killed by an an Afghan soldier.

"I think it shows weakness," said Santorum on the apology.

Santorum is not the first Republican to criticize President Obama for his actions. Republican presidential candidate Newt Gingrich said it was "an outrage" for the president to issue an apology.