The President's law-breaking
And here are two excellent sources well worth reading, which further demonstrate the utter clarity of the Bush Administration's law-breaking:
(1) A Federalist Society debate (.pdf file) in which Robert Levy, conservative Federalist Society member and Senior Fellow in Constitutional Studies at the Cato Institute, obliterates the Bush Administration's legal defenses (h/t ReddHedd, via e-mail); and
(2) A post at Think Progress which lays out the irrefutable answer to the Bush Administration's primary defense -- that Congress authorized it to eavesdrop outside of FISA when it enacted the AUMF.
The more these issues get debated, the clearer it becomes that the Administration broke the law.