Why has the Obama Administration's healthcare program polarized the American politicians and public so much?

I’ve been following the news on the Obama’s healthcare program (I remember that this was also a big issue during the Clinton years, until he got involved with Lewinsky) and was alternately amazed and wondering why it has become such a political issue, as it is. What are the salient points and points of contention in said program, and what’s your take on it?