Half of Americans are opposed to any sort of sales tax (including a VAT) to pay for government-controlled health insurance, according to Rasmussen.  Only 18 percent support a national sales tax at all, but:

There is more support for the concept if sales tax revenue is used to provide health insurance for all Americans. In that scenario, 40% favor a national sales tax and 49% are opposed.

Democrats strongly support a national sales tax to provide universal health insurance coverage. Republicans are opposed by a three-to-one margin, and those not affiliated with either major party are opposed two-to-one.