Even if I am wrong about the total tax paid by individuals tending to vote Republican versus Democratic (fat chance), you repeat
the errors of both aggregation and equating vote totals with tax totals.
The answer is, man - made global warming supporters simply wave their hands in the air, assume Gaussian or near - Gaussian distribution
of errors from a multitiude
of very complex, biased sources, declare they cancel out, and that
aggregation and division allow them to generate a result with 0.00 accuracy even though the input data can not be measured to that degree
of accuracy.