Amendment #4

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.

The fourth amendment protects citizens agains unreasonable search and seizure. 

In this video it explains that probable cause is not involved in the fourth amendment and it violates Americans rights. I think that in many cases Americans rights to the fourth amendment are being violated by the government.