jamyskis: As controversial as it may sound, I do agree with Donald Trump on one thing: the United States is not a democracy. It's by and large a plutocracy, although I suspect that it is not plutocratic enough for Trump. As people have said here, political influence can be bought by financing campaigns, and major lobbying bodies such as the RIAA, MPAA, 'big oil' and the AHIP exert considerable influence over policymaking.
In fact, looking back over the history of the US, I don't think it ever has genuinely been a democracy. It was certainly even worse in the 1800s.
It's a Representative Republic, and those reps can be heavily influenced by money. This is nothing new. As said earlier by others though, grass-roots campaigns and well-meaning interest groups can influence as well, as does responsibility before a free media.
Straight democracies don't work, basing everything on majority rule. How long would civil rights have taken if it was straight majority rule?