BOSTON (AP) -- Mitt Romney is promising to reduce taxes on middle-income Americans.

But how does he define middle-income ? The Republican presidential nominee defined it as income of $200,000 to $250,000 a year.

Romney commented during an interview broadcast Friday on ABC's Good Morning America.

The Census Bureau reported this week that the median household income -- the midpoint for the nation -- is just over $50,000.

The definition of middle income or the middle class is politically charged. Both presidential candidates are fighting to win over working-class voters.

President Barack Obama has defined middle class as income up to $250,000 a year.

Obama wants to extend Bush-era tax cuts for those making less than $250,000. Romney wants to extend the tax cuts for everyone.

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