Balkin on unlawful enemy combatants
Jack Balkin explains in more detail how the Military Commissions Act could be used to indefinitely detain citizens. (I'm pretty sure this is what at least the administration intends, since it more or less ratifies what they did to Jose Padilla.)
no subject
I would include that sentence in your letter, maybe followed with something like "I am glad that our representatives have strong moral values and choose to do what is good instead of what seems expedient."