Do anti-doping agencies have any right to violate constitutional rights of athletes?

Lawmakers of California claim that anti-doping agencies violate fundamental constitutional rights of sportspersons suspected of doping. Thus, athletes that have never tested positive for any prohibited medicines are targeted. That’s why the lawmakers initiated a request to Congress to review this issue.
It is known that the USADA is sponsored chiefly by taxpayers. The Office of National Drug Control Policy (ONDCP) gives 10 million dollars every year. This governmental office promotes fighting against administration of banned substances. Its goal is to exterminate illegal manufacture and drug use, crimes resulted from administration of illicit substances, etc.
The request of California legislators was initiated soon after Lance Armstrong decided not to appeal his lifetime suspension from professional sports.
Everybody knows that the former cyclist Lance Armstrong has been stripped of his 7 titles won at Tour de France. He was also banned from competitions entirely.
Summer Lance Armstrong filed a lawsuit against the USADA, affirming that his constitutional rights were violated. But the judge Sam Sparks refused to accept the lawsuit. He claimed that the USADA acted correctly. He also said that the USADA was established in order to clean sports from sportspeople who apply prohibited medications.
California Senator Michael Rubio affirmed that Sam Sparks didn’t act appropriately, refusing to accept the lawsuit against the USADA. So, the senators affirmed that the USADA violated rights of some athletes. That’s why they presented the request before Congress.