When the powers of an agent of the federal government come into conflict with the rights of a citizen, the powers granted to the government most certainly apply

When the powers of an agent of the federal government come into conflict with the rights of a citizen, the powers granted to the government most certainly apply (the right to freedom of movement). TSA agents are not law enforcement officials; they can conduct administrative searches /only/. The extent of the searches is currently being litigated, but we have to deal with the status quo until the courts or the legislature deals with it. The TSA has moved from airports, to train stations, to subways, and roadblocks. If you live in any portion of the US you most likely use at least one of those methods of transport on a daily basis.