No, Virginia, there is no national sales tax, but politicians are politicians and tax holidays are popular gimmicks. Some of the politicos in Washington, DC, are talking about a national sales tax holiday that would hit right in the middle of the Christmas buying season. The idea is that the federal government would reimburse the states that have a pre-Christmas sales tax holiday. It's been the subject of conversation both in the national and state capitals, but the proposal is fraught with the sorts of pesky details that could easily sink it.