Ever wondered which state has the highest marginal income tax rate? Or which states have no income tax?

Thanks to a map from the accounting firm O'Conner Davies, we know the answer to question one is California (13.3 percent) and the answer to question two is Alaska, Washington, Nevada, South Dakota, Texas and Florida and Tennessee (as the map key below indicates, Tennessee does not  have an income tax. The six percent rate noted on the map refers to Tennessee's tax on income from interest and dividends.)

So how do tax rates in the red states stack up against tax rates in the blue states? Using the 2012 election results to measure that, we find the average state income tax rate in states (plus D.C.) that Obama won is 6. 4 percent, while the average rate in states Mitt Romney won is 4.9 percent.