In the past 15 years, I've debated in favor of a national sales tax, testified before Congress on the merits of a national sales tax, gone on TV to advocate for a national sales tax, and spoken with dozens of reporters to explain why a national sales tax is a good idea. Even though I prefer a flat tax, I've been an ardent defender of sales tax proposals such as the FAIR tax because it would be a great idea to replace the current system with any low-rate system that gets rid of the tax bias against saving and investment. I even narrated this video explaining that a national sales tax and flat tax are different sides of the same coin — and therefore either tax reform proposal would significantly improve prosperity and competitiveness.

I will continue to defend the FAIR tax and other national sales tax proposals that replace the income tax, but I wonder whether this is a losing battle. Every election cycle, candidates that endorse (or even say nice things about) the FAIR tax wind up getting attacked and put on the defensive. Their opponents are being dishonest, and their TV ads are grossly misleading, but they are using this approach because the anti-FAIR tax message is politically effective. Many pro-tax-reform candidates have lost elections in favorable states and districts, largely because their opponents were able to successfully demagogue against a national sales tax.

The Wall Street Journal reaches the same conclusion, opining this morning about the false — but effective — campaign against candidates who support a national sales tax.

In 16 House and three Senate races so far, Democrats have blasted GOP candidates for at one point or another voicing an interest in the FAIR tax. ...FAIR tax proponents are right to say these Democratic attacks are unfair and don't mention the tax-cutting side of the proposal, but the attacks do seem to work. Mr. Paul's lead in Kentucky fell after the assault, and the issue has hurt GOP candidate Ken Buck in a close Colorado Senate race. In a special House election earlier this year in Pennsylvania, Democrat Mark Critz used the FAIR tax cudgel on Republican opponent Tim Burns. In a district that John McCain carried in 2008, Mr. Critz beat the Republican by eight points and is using the issue again in their rematch. This is a political reality that FAIR taxers need to face. ...[I]n theory a consumption tax like the FAIR tax is preferable to an income tax because it doesn't punish the savings and investment that drive economic growth. If we were designing a tax code from scratch, the FAIR tax would be one consumption tax option worth debating. But ... voters rightly suspect that any new sales tax scheme will merely be piled on the current code.

We won't know until next Tuesday what is going to happen in Kentucky and Colorado, and we won't know until then what will happen in the other campaigns where the FAIR tax is an issue. But if there are two tax reform plans that achieve the same objective, why pick the approach that faces greater political obstacles?

FAIR tax proponents presumably could defuse some of the attacks by refocusing their efforts so that repealing the income tax is the top priority. This would not require any heavy lifting since all honest proponents of a national sales tax want to get rid of the 16th Amendment and replace it with something that unambiguously prohibits any direct tax on income. So why not lead with that initiative, and have the national sales tax as a secondary proposal? This is what I propose in the video, and I think it would be much harder for demagogues to imply that a FAIR tax would mean a new tax on top of the corrupt system that already exists.