The focus on the AMT is hardly surprising, given that victims of the tax have been concentrated in high-cost urban areas such as Washington, New York and San Francisco — places that tend to vote Democratic. Rangel, Hoyer and Nancy Pelosi (D-Calif.), the presumptive House speaker, all represent states hit hard by the AMT, which is sometimes called the “blue-state tax.” To map states with the highest concentrations of AMT taxpayers is to draw bull’s-eyes over California and the Northeastern seaboard.