Would the US be better off with a multi-party system?

[kyc0705]

Multi-Party system? Not in our first-post-the-post system, our Presidential republic. We would need a Parliamentary system to have relevant third, forth, and fifth Parties. A fifth Party could easily be the "Knights Party", the political arm of the KKK. Does anyone want a coalition involving the KKK or the Communists? 

Generally speaking, most multi-party democracies specifically avoid forming coalitions with extremist parties.