The global regulator of doping in sports, responding to questions about why it did not respond more aggressively to whistle-blowers’ accusations of a government-run doping program in Russia, has told United States lawmakers that it did not have the authority to investigate such claims.
In a letter sent on July 5, the World Anti-Doping Agency — which is partly funded by United States taxpayers — replied to questions that Senator John Thune, Republican of South Dakota, had posed on behalf of the Senate Committee on Commerce, Science and Transportation, which has jurisdiction over sports and of which Mr.