That would be horrible...why?
Here in NH, we have no sales tax.
People have been adamant that if the state imposes a sales or income tax, they will have to repeal the property tax.
Most of us will buy local or shop by phone if the feds do this.
As for states that already have a sales tax, I surmise that most of those folks are already rankled about the state sales tax.
Having to fork-over additional sales tax to the feds is a deal-killer.