But the analogy, they say, is the nuclear Non-Proliferation Treaty that took 20 years to obtain 178 members--and only after the United States used sanctions to force the hand of reluctant governments.
The U.S. did not interfere in other governments' decisions to accept the nuclear Non-Proliferation Treaty. 
mnli hypothesis: The U.S. did not interfere in other governments' decisions to accept the nuclear Non-Proliferation Treaty.  premise: But the analogy, they say, is the nuclear Non-Proliferation Treaty that took 20 years to obtain 178 members--and only after the United States used sanctions to force the hand of reluctant governments.