The only time a politico will try to avoid playing the blame game is when they or theirs are to blame.
One of the things I write about a bit in my Madam Secretary memoir is on Rwanda, where I was an instructed ambassador at the U. N. , and my instructions were to not vote for increased forces there, and I didn't like my instructions. So I got up and called Washington and said, "Change my instructions," and they didn't.