In 2016, McGrath authored an editorial for "Foreign Policy" magazine, calling for a thorough investigation of the decision-making process that the U.S. government took leading up to the Iraq War, similar to the British Chilcot Report. She cited the "seven investigations, ... 33 hearings, and ... almost $7 million examining every facet of the disaster in Benghazi, Libya, in which four Americans were killed," and contrasted it with the "4,806 American and coalition members deaths and 32,246 wounded" and estimated $3 trillion spent during the Iraq War, without any investigation.