Explanation:
We need to bear in mind the context of President Ronald Regan when uttered those words on Tuesday, January 20, 1981.
At the time it was uncommon among countries of the world for a peaceful transition of power from a sitting president to a newly elected one. In Ronald's case, he won sitting president Jimmy Carter in the elections and Carter accepted the outcome.
Hence, Regan described the peaceful transfer of power as a "miracle" in the eyes of citizens of other countries at the time who had probably not experienced that before.
