Though GOP Blames Obama, North Korea Developed Its Nuclear Program Under Republicans | ThinkProgress

Despite claims to the contrary, strong stances have not always worked in the past against North Korea. Ronald Reagan was in office in 1986 when plutonium was first produced in a North Korean reactor. They continued their program under President George H.W. Bush, producing enough plutonium to make 1-2 bombs...
http://thinkprogress.org/world/2016/01/07/3736570/north-korea-obama/