Presidential Candidates Flat Tax vs. Fair Tax
Today Senator and Presidential Candidate Sam Brownback has written an editorial supporting what he calls an "optional flat tax". It would have a huge standard deduction of $20,000 for individuals and $40,000 for families and the rate would only be 15-20%. The details are unclear, but this is obviously not a revenue neutral plan.
Mike Huckabee has also come out in support of the FairTax proposal, that is a 22% sales tax with a large pre-bate for essential goods.
Other candidates have not publicly supported fundamental tax reform, although many favor cutting taxes.