John McCain reported giving more than $202,000 — a quarter of his income — to charity in 2006 and 2007, the only years for which his campaign released his tax returns. His campaign didn't release information about his wife's charitable contributions, however. In 2006, her total itemized tax deductions, a category which includes charitable contributions and other deductible items such as mortgage interest, was $569,737, or 9.3% of her income.
The McCain campaign has not said when his running mate, Alaska Gov. Sarah Palin, will release her tax returns. The Democratic National Committee has criticized McCain for only releasing two years' worth of his returns, rather than the seven years' worth of complete returns released by Obama and the decade's worth from Biden.
Compared with the two presidential candidates, Biden's income is much more modest. His earnings in the past decade ranged from a high of more than $320,000 in 2005 to a low of $210,797 in 1999.
Besides his Senate salary and his wife's earnings, Biden also reported earning $20,500 a year from Widener University, where he's listed as an part-time, adjunct instructor of a constitutional law class. Widener has campuses in Delaware and Pennsylvania.