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- Norman Mailer
- Eric Massa
- Charles Mathias
- Pete McCloskey
- Jim McDermott
- George McGovern
- Ray McGovern
- Robert McNamara
- Merrill McPeak
- Camilo Mejia
- Tom Metzger
- Walter Mondale
- Markos Moulitsas
- Diana Morrison, a founder of Iraq Veterans Against the War
- Bill Moyer
- Bobby Muller
- Patrick Murphy
- John Murtha
Read more about this topic: List Of Veterans Critical Of The Iraq War