It seems that some Americans are:
If my federal taxes are any indication then the middle class is almost certainly not paying its "Fair Share" of federal taxes. My tax position is utterly ordinary. Married with three kids, gross annual income of approx $68K. I take only the standard deductions (no Schedule A) and received the Child Tax Credit for all three children. My total tax bite for each of the last three years was approximately $900/year, or barely over 1%.