Why W's wiretaps are illegal

Just in case you want to see some legal-ese on the the appropriate laws:

"In the absence of a judicial order approving such electronic surveillance, the surveillance shall terminate when the information sought is obtained, when the application for the order is denied, or after the expiration of 72 hours from the time of authorization by the Attorney General, whichever is earliest. In the event that such application for approval is denied, or in any other case where the electronic surveillance is terminated and no order is issued approving the surveillance, no information obtained or evidence derived from such surveillance shall be received in evidence or otherwise disclosed in any trial, hearing, or other proceeding in or before any court, grand jury, department, office, agency, regulatory body, legislative committee, or other authority of the United States, a State, or political subdivision thereof."

That's just part of it. Highly recommended reading.