This is a very interesting thread. Because it raises the question of definitions and what definitions exclude or include. Yes, a Republic can be a democracy, as can a monarchy or a parliamentary Democracy. So What DOES being a democracy mean ? I would say that by the cuurent world standard that the USA IS a democracy, as are many other countries, not all of whom are republics.
    Although I am not a big fan of the American brand of saving the world, I do respect the democratic principle of America, flawed as it is. However, I do believe there countries that are better at democracy, if democracy means a social contract with citizens.
    America may not be perfect but to suugest that is not a democracy is a bit over the top.