I've been trying to argue for some time that with two parties, even accounting for their primaries, the bandwidth of our representation is much too low to communicate a spectrum of political ideas. I forget the exact numbers I calculated, but from memory, current American democratic bandwidth at the national level is something in the neighborhood of 5 bits per year. This can't allow for any kinds of subtle distinctions between philosophy. We're stuck with big ugly buckets of loosely-related (at best) issues because we can't democratically communicate any more specifically.