After the New York Times reported that Sen. John Walsh plagiarized at least a quarter of his master's thesis, the Montana Democrat is telling The Associated Press that post-traumatic stress disorder may have played a role.
"I don't want to blame my mistake on PTSD, but I do want to say it may have been a factor," the Iraq war veteran said. "My head was not in a place very conducive to a classroom and an academic environment."
Walsh told the AP that he was on medication at the time and was dealing with the suicide of a fellow veteran.
Walsh was appointed to the Senate in February, after Max Baucus resigned to become the U.S. ambassador to China.