Sen. John Walsh plagiarized his final thesis for his master’s degree at the Army War College from sources at the Carnegie Endowment for International Peace, and a 1998 essay written by Sean M. Lynn-Jones, a scholar at Harvard’s Belfer Center for Science and International Affairs, according to an analysis by the New York Times.

The analysis found nearly a third of the paper was composed of material either similar or verbatim to other sources, and is presented without attribution. Another third uses the exact language of other sources, but is attributed through footnotes. However, the language is often presented without quotation marks, a practice forbidden by War College rules.