Swimmer Micheal Phelps, believes he never raced against a entirely clean international field.
The U.S born Swimmer, wants U.S lawgiver to push for global anti- doping reforms.
The 31 years - old swimming was giving proof at a US House of attorney heaving into improving anti-doping portion.
The America government helps to vein the world anti - doping agency and the comittee could acclaimed giving more money to the organisation.
A chronicle commissioned by Wada and written by lawyer Richard McLaren demand December that more than 1,000 Russian athletes enhanced from state - promoted doping programme between 2011 and 2015.
The chief executive of the US anti - doping agency Travis Tygart, also dispatched Tuesday's hearing at the House of Representatives, he advised politicians the International Olympic elect against a blanket ban of Russian athletes at Rio 2016.