"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized." - For those unfamiliar, the above statement is the 4th Amendment to The Constitution of The United States of America. No one, including a government agency, may infringe upon that right without facing Federal Criminal Prosecution.
Unless, of course, you are the TSA.
"Nobody likes having their Fourth Amendment [rights] violated going through a security line, but the truth of the matter is, we're gonna have to do it." — Mo McGowan, former Director of TSA Security Operations
I'm sorry, Mr. McGowan, you are incorrect and as such can kiss my ass. The Constitution is the Supreme Law of The Land, but I suppose you, like most of the current administration, are unfamiliar with that particular document.
Just in case you haven't read it: Article VI, Section 2, of the U.S. Constitution is known as the Supremacy Clause because it provides that the "Constitution, and the Laws of the United States … shall be the supreme Law of the Land."
Here it is in it's entirety:
Article VI (That's 6 in case you don't understand Roman Numerals)
Clause 2: This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the Contrary notwithstanding.