Being the Senate

Ezra Klein writes in the Washington Post of the need for Senate reform. I agree. We can start with term limits and reforming campaign finance. But I have been wondering lately after the incredible acrimonious health care debate and dubious horse-trading that seemed to do more for particular states of various senators as opposed to the country as a whole, if the Senate itself is even needed. We have a legislative body, the House. Why even have the Senate? Maybe this is radical change we can believe in.