The post I quote and link to below is one of the better outlines of why we need a third, centrist, option to the two party duopolistic system we have now that I've come across recently.
Here's a taste, from Chris Rickert at the Wisconsin State Journal:
"...state house and senate and Congressional district races — our two major parties long ago agreed that carving up the electorate by party affiliation was preferable to democracy. Yes, the party in power seeks to give itself an advantage every 10 years when Census results are released and districts are re-drawn. But by and large, there is a bipartisan understanding that some areas lean Democrat, some Republican — and it's better to pack like-minded voters into noncompetitive districts and save one's considerable resources for battles in a dwindling number of competitive ones.
More than collective bargaining rights, human rights, corporate rights or any other right, two-party hegemony and a bro...