ABC News:  How Politically Risky Are Obama’s Proposed Tax Hikes?, by Jake Tapper:

Anne Mathias, an economist of the Stanford Group Company, has an interesting analysis of just who the top wage earners in the U.S. are — and where they live. Sen. Barack Obama, D-Illinois, has proposed raising a number of taxes. Most notably perhaps he has discussed allowing the Bush income tax cuts (that Sen. John McCain, R-Ariz., voted against but now supports) to expire. He says that Americans earning less than $250,000 per household will see their taxes cut, not raised.

Mathias points out that 95.1% of the American people are in households that earn less than $200,000 — so overwhelmingly most Americans will not see their income taxes increased, if Obama’s math is correct. …

There’s another component to this — check out this map, by Mathias, which is interesting: The designated areas are the top 50 major city areas by income, transplanted on an electoral map of the U.S. from 2004 featuring red Bush states and blue Kerry states. …

As you can see, most of these top 50 major city areas, income-wise are either in blue blue blue states (California, Massachusetts, New Jersey, or New York) or red red red states (Alaska, Texas), with fewer in swing states (with some notable exceptions such as Philadelphia, Penn., or West Palm Beach-Boca Raton, Florida.)

Mathias’ conclusion: Obama’s proposed income tax increases are not very risky at all, numerically speaking, in terms of number of voters or states he will impact. Overwhelmingly most Americans will not be touched, and the ones who will are largely in electorally decided states already.