FBI whistleblower and congress candidate faces off with talk show host

Cindy Sheehan's son was killed while serving in Iraq and she began an anti-war rally weeks ago in Crawford, Texas, that continues despite her departure due to her mother's stroke.

Coleen Rowley, the Minneapolis-based 9/11 FBI whistle-blower, went to Crawford recently to show her support for Sheehan. Now critics of Sheehan and the anti-war movement are mobilizing, too.

Mark Williams is a radio talk show host and one of the organizers of an anti-Sheehan rally called "You Don't Speak For Me, Cindy," a caravan of war supporters leaving California today and arriving in Crawford Saturday. Both joined 'Hardball' guest host Norah O'Donnell on Monday to discuss the war and the protest in Texas.

To read an excerpt of their conversation, continue to the text below. To watch the video, click on the "Launch" button to the right, MSNBC reports.