Now that Huckabee has made such a big and unexpected splash, you are going to hear more and more about the tax reform proposal he has endorsed – the "Fair Tax."  Here are a couple of sources if you are interested in delving more deeply into this issue:

The book about the Fair Tax is here on Amazon.com and there are over 1400 reviews of it, some with very in-depth analysis pro and con.

There is a website promoting the Fair Tax.

The Time/CNN blog site of Justin Fox, "The Curious Capitalist," has a post about it along with a lengthy, robust (and amazingly civil) discussion from all angles.

[Please note that neither I nor CE is endorsing Huckabee or the Fair Tax proposal.]