Democratic Underground - Breaking the FISA law, for starters

He authorized warrantless wiretapping, which is clearly a violation of the FISA law.

One more to try on for size is the violation of Authorization for Use of Military Force Against Iraq Resolution of 2002 (Public law 107-243, 116 Stat. 1497-1502)

(b) Presidential Determination.--In connection with the exercise of
the authority granted in subsection (a) to use force the President
shall, prior to such exercise or as soon thereafter as may be feasible,
but no later than 48 hours after exercising such authority, make
available to the Speaker of the House of Representatives and the
President pro tempore of the Senate his determination that--
(1) reliance by the United States on further diplomatic or
other peaceful means alone either (A) will not adequately
protect the national security of the United States against the
continuing threat posed by Iraq or (B) is not likely to lead to
enforcement of all relevant United Nations Security Council
resolutions regarding Iraq; and
(2) acting pursuant to this joint resolution is consistent
with the United States and other countries continuing to take
the necessary actions against international terrorist and
terrorist organizations, including those nations, organizations,
or persons who planned, authorized, committed or aided the
terrorist attacks that occurred on September 11, 2001.

Plainly he started the war without legitimately determining that the actions were warranted. Available intelligence did not establish that Iraq was a threat, and at the time he decided to start the war, UN inspectors were getting unprecedented access to Iraq. He went to war on a whim or ulterior agenda, and the resolution did not provide for that. One might also add that diverting resources from the war Afghanistan and the hunt for Bin-Laden was criminally inconsistent with section (2) of this law.

No doubt with proper investigations would come proof he's committed many more crimes involving lying to Congress, corrupt practices, suppression of free speech (e.g., during campaign visits), etc., etc.

Reply #21: Breaking the FISA law, for starters [View All]