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.