"I have yet to see anyone support the notion that you can wiretap U.S. citizens without a court order and not be in violation of both the law and the constitution."
You prove that there are none so blind as those who refuse to see.
Go read FISA. The links are provided.
FISA has been upheld as constiutional, as have other, earlier, acts that gave much less protection.
You seem to just be unable to get it.
NO WHERE in FISA does it allow the President to allow a warantless wiretap on a citizen of the United States. No where. No one has posted any information to the contrary.