What was the significance
of President Reagan's use of the phrase "It is
morning in America."

President Reagan's use of the phrase "It is  morning in America" helped him win the presidential elections in 1984. He used this slogan to describe the prospering economy and living standards of the American Citizens. He described that the shadows have uplifted.

This slogan for his presidential campaign depicted his uplifted spirit in the darkest of times. For example when he was shot, he kept his spirit high and used this slogan. It gave Americans the hope and spirit that they needed to get through tough times.

since most of current immigration into the u.s., both legal and illegal, is coming from latin america. it would be very difficult to imagine or rationalize a country my fellow citizens are trying desperately to flee into, would pose a threat to my prosperity or freedom. since the u.s. has a long history of intervention, but no record of permanent occupation, i would not feel oppression is the main objective.  

the largest free trade nation, along with the largest gdp in the world wanting to expand it's economic policy on us, and including us, could only be positive. the u.s. government has no interest in, or way of simply forcing american culture on us. and has no track record of it. other nations that adopted american social culture, or "americanization" did so voluntarily, mainly through the choice of allowing american businesses and u.s. citizens to come into their nations, as free operatives.