Wrong - US Swimming is currently working with USADA to test foreign training partners of US swimmers who are training here in the US. So, it is possible.
Citizen Runner wrote:
This is incorrect. USADA (not USATF) has autonomous authority to perform out of competition testing only on U.S. citizens. It can perform out of competition testing on foreign athletes residing in the U.S. only at the request of their country's governing authority.