I don't know anything at all about this site, so I can't vouche for the reliability of this info.
"The term `lawful enemy combatant' means an individual who is--
A. a member of the regular forces of a State party engaged in hostilities against the United States;
B. a member of a militia, volunteer corps, or organized resistance movement belonging to a State party engaged in such hostilities, which are under responsible command, wear a fixed distinctive sign recognizable at a distance, carry their arms openly, and abide by the law of war; or
C. a member of a regular armed force who professes allegiance to a government engaged in such hostilities, but not recognized by the United States.
The term `unlawful enemy combatant' means an individual engaged in hostilities against the United States who is not a lawful enemy combatant.
If Congress intended to protect U.S. citizens from vulnerability to the designation of "unlawful enemy combatant," they only needed to append the phrase "or a U.S. citizen" to the end of the second definition.
But this is by design. Congress has now completed the groundwork for Bush’s ultimate goal: to be able to prove that dissent is the equivalent of "hostility" against the United States – that dissent is disloyalty, or treason.
In effect, Bush is increasingly threatened by a wave of rising intolerance and skepticism, and he wishes for the unconstitutional power to convert his political enemies to enemies of the state. Neoconservative apologists like Sean Hannity and Bill O’Reilly have been promoting this concept for the last several years, so there are already tens of millions of witting victims in their audiences who are on board with this concept."
http://www.lewrockwell.com/orig7/trotter5.html