That's the problem with party-driven politics; the limited scope of which issues decide elections. Copyright is never a frontline issue during elections because there are always bigger problems. In effect, democracy doesn't apply to copyright legislation because the majority doesn't let IP decide their vote.
It's not at all a problem with party-driven politics. The problem is that the government and the parliaments in the US don't accurately represent the people.
That's a problem with a broken democracy. In Europe you don't have that problem, at least not to such an extreme extend.
Democrats; Supported by Hollywood.
Republicans; Supported by big companies.