I enter new contacts every day. If I don't physically
remove the "United States of America" country designation,
when I call up as contact into a letter or envelope, it
includes the country. Then I have to take time to remove
it from the letter or envelope.

I was hoping for a simple solution to avoid all the extra
clicking, and the possibility that it gets missed on a
merge.

Furthermore, the U.S. Post Office wants the
designator "USA", not "United States of America".

One more thing, the Post Office doesn't want a comma
between the city and state, but Outlook insists upon
putting one in.