Teresa Heinz Kerry (search) may be the richest potential first lady ever to hit the campaign trail, having earned more than $5 million in taxable and non-taxable income last year. The campaign of her husband, Massachusetts Sen. John Kerry (search), released Heinz Kerry's personal tax information on Tuesday, after revealing that she received an extension to file her 2003 federal income tax return. Heinz Kerry, who files her returns separately from her husband, said she will make available the first two pages of her 1040 when it's filed in October. Of the $5.115 million in income, about $2.3 million of...