I didn't say that warrants weren't issues for those two cases. My point was that people who are considered legal U.S. citizens (e.g., John Walker Lindh and Jose Padilla) can and do communicate with Al Qaeda overseas. Monitoring people like these two individuals would not be legal under the law cited by the original poster of this thread. It may be perfectly legal under another law, but not this one.
And that may very well be the trap that the democrats and the media will walk into.