The U.S. is not a democracy merely because it incorporates democratic functions.
That's like saying that a car is an engine because it incorporates an engine. The U.S. is a republic. Go look up the definition of republic. Unlike with democracy, the U.S. perfectly fits the definition of a republic whereas it only partially fits the definition of a democracy. A republic and a representative democracy are similar, but not the same.
Federations have elections. Are they democracies? No.
Constitutional monarchies have elections. Are they democracies? No.
Sorry, but words have meanings. Just having elections is not the only qualifier for being 'a democracy.'
If all you were saying was that the U.S. has democratic processes, that's fine, but calling it a democracy due to that is inaccurate.
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