The front-page smear story that provoked it:
Foes Use Obama's Muslim Ties to Fuel Rumors About Him
By Perry Bacon Jr.
Washington Post Staff Writer
Thursday, November 29, 2007; Page A0
In his speeches and often on the Internet, the part of Sen. Barack Obama's biography that gets the most attention is not his race but his connections to the Muslim world.
Since declaring his candidacy for president in February, Obama, a member of a congregation of the United Church of Christ in Chicago, has had to address assertions that he is a Muslim or that he had received training in Islam in Indonesia, where he lived from ages 6 to 10. While his father was an atheist and his mother did not practice religion, Obama's stepfather did occasionally attend services at a mosque there.
Despite his denials, rumors and e-mails circulating on the Internet continue to allege that Obama (D-Ill.) is a Muslim, a "Muslim plant" in a conspiracy against America, and that, if elected president, he would take the oath of office using a Koran, rather than a Bible, as did Rep. Keith Ellison (D-Minn.), the only Muslim in Congress, when he was sworn in earlier this year.
(Hat Tip: The Plank)