Like Long Island Sauvignon Blanc, Virginia's Viogniers can be tough to find, but they are also fabulous wines that will help expand our definition of what a domestic fine region is, and when choosing a wine for the Fourth, selecting one from a state as important as Virginia, site of America's first colony, has a certain symbolic appeal! Unfortunately this recommendation might prove to be just that, symbolic, since these wines are currently very narrowly distributed.
In fact I am hesitant to make a specific recommendation since the wine will no doubt be hard to find but nonetheless if you can find one Virginia Viognier it will probably be from Horton or Blenheim. I'm partial to the Blenheim, which is about as complex and pure an example of Virginia Viognier as I've come across. It makes for a great pairing with spicy Asian or latin American influenced dishes