US regularly interferes in internal affairs of other countries. Examples: Iran's nuclear programme, Use of nuclear energy in India, Japanese economic investments in other countries, etc. How do some countries successfully deal with this US interference and move on to complete their projects? What's their methodology?

Interference in internal affairs of other countries takes a lot of hardwork. The process detail is out of scope of this thread. It would suffice to say that it involves a lot of hardwork and after a few days it becomes tedious. So the strategy is to tire them out. Wait for days till Americans become fatigued and they lose interest in the issue. This is a time-tested method that works everytime. What seems like a great challenge at one point lasts for a while and then tapers off.