In a campaign speech in Iowa Paul noted that even Nazis after World War II got trials. Now even a U.S. citizen such as Anwar al-Awlaki can be assassinated without any trial, or even being charged. Both Awlaki and also his son a 16 year old were both killed in Obama ordered drone strikes.
Of course, the Obama defenders will simply say that there is a state of hostilities between Al Qaeda and related groups and the U.S. and just as in warfare one can target and kill the enemy without trial. At the same time the Obama administration does not even regard the term "war on terror" as politically correct while employing the notion of hostilities as a means to place any suspected terrorist beyond the reach of any basic legal rights.