Everyone pays taxes, once things like sales tax and property taxes are included (evenarenter effectively pays property tax, since the landlord is passing on that cost). But if you want to only count federal tax, then you have to at least count people who pay payroll taxes (social security and medicare). And you probably want to include people who paid those federal taxes in the past, but don’t now because they are retired. Though if you skip the retirees, it helps Obama.
Note that one of the 5 states to *never* vote for Romney is “his state”, the only one where he held office. Maybe the rest of the white men should listen to the white men from MA.