Interesting article on ABCNews:  No Disclosure: Presidential Candidates Defy Tradition, Refuse to Release Taxes, by Jennifer Rubin:

In a break with the tradition of recent presidential campaigns, most of the major presidential candidates aren’t releasing their income-tax filings. … That means voters are likely to know less about the income sources, personal wealth and charitable inclinations of the presidential candidates than in any election in the past generation.

Since 1984, only one major-party presidential candidate — Bill Clinton in 1992 — has refused to release the tax forms he sent to the IRS. …   Yet as the 2008 election draws near, the only top-tier candidate who has committed to releasing his 1040 forms is Sen. Barack Obama, D-Ill., who already made public the return he filed this year.

(Hat Tip:  Philip Cleary.)