Title: Black star rising
Description: From back cover Del Ray paperback April 1986:

TAKE US TO YOUR LEADER, IF YOU CAN..."

When a mysterious alien spacecraft approaches Earth and demands to speak with the President of the United States, then destroys a large pacific island to demonstrate its strength and underscore its seriousness, you would expect the President to talk.

Problem is, in the late twenty-first century, there *is* no President -- not even a United States.  In fact, in this world of the future, China rules the Americas; and, to most people, "USA" and "USSR" are just quaint abbreviations in historical dictionaries.

Then the aliens prove unreasonable about accepting substitutes... so one Anglo rice-cultivator from the Heavenly Grain Collective Farm -- near Biloxi, Mississippi -- is forced to begin an adventure that will take him from peasant to President, from Pettyman to Spaceman.
Subjects: American Science fiction, Fiction, science fiction, action & adventure, Fiction, war & military, United states, fiction, Soviet union, fiction, India, fiction, China, fiction