"Dissent is the highest form of patriotism" (Jefferson? Paine?)

[bapopik at AOL.COM]

Who said "Dissent is the highest form of patriotism"?
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Mark Steyn makes a whole column out of it in today's New York Sun.
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I'm at work right now and need help before I post on this.
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It looks as if Steyn didn't query any Fred Shapiro-types.

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