Is the FairTax Political Poison?

I have a question for my friends who support a national sales tax. First, some background. Beginning with the defeat of Woody Jenkins in his Louisiana Senate race back in the 1990s, various versions of the national sales tax have caused political headaches for GOP candidates. Even candidates from conservative states, such as Sen. DeMint in South Carolina, have been put on the defensive because they said good things about the FairTax. The latest example comes from the Pennsylvania special election for Rep. Murtha's seat. As this Wall Street Journal column points out, the winning Democratic candidate hammered the Republican because of his support for the FairTax. So even though I have said very nice things about a national sales tax, testified about the virtues of the national sales tax, and debated in favor of a national sales tax over the current system, I am increasingly convinced that the flat tax is the only plan that is sufficiently immune to demagoguery. Can anyone give me a persuasive argument about the political viability of the FairTax?

Democrats turned the table and ran against Mr. Burns on taxes. The GOP businessman had flirted in the past with supporting the FAIR tax, a version of a national sales tax that supporters want to replace the income tax. Mr. Critz's ads blasted Mr. Burns for supporting a 23% sales tax increase without mentioning the income tax elimination, and the GOP seems to have been caught flat-footed. Republicans can rightly complain that this is unfair and that Mr. Critz will vote to raise taxes when Mrs. Pelosi gives the order. But they need a real-time campaign answer to the tax-hike charge. Whatever the merits of the FAIR tax in theory, we've long thought it is a political loser because voters figure they'll get the sales tax without losing the income tax. At a minimum, FAIR tax supporters shouldn't have left Mr. Burns defenseless on the subject. By the way, this is also a political warning to Republicans inclined to fall for the Democratic trap of agreeing to a new value-added tax in return for lower income-tax rates.