Do 40 percent of Americans pay no taxes? November 7, 2008 About 38 percent of households have zero or negative income tax liability, but they pay other federal taxes.

Can the presidential candidates keep their campaign money? November 5, 2008 No. They can donate any contributions they haven't spent to charities or political parties, and they can pay leftover campaign bills. The big rule is: no personal use.

Who spent more money on advertising, McCain or Obama? November 3, 2008 Overall, Obama has outspent McCain by nearly 3-to-1, but in the closing week it's been closer to 5-to-1.

Can I wear my campaign button to the voting booth? October 31, 2008 It depends on which state you live in, but the expert advice is to leave the campaign paraphernalia at home.

Did Michelle Obama spend $450 on room service? October 29, 2008 No. The claim is a total fabrication, and the sources that publicized it have retracted the story.

What about that Anne Kilkenny e-mail? October 20, 2008 The facts in the e-mail message about Alaska Gov. Sarah Palin are mostly correct.

Did Obama request a $3 million 'overhead projector,' as McCain claimed? October 14, 2008 Obama did seek a $3 million earmark, but it was not for the sort of 'overhead projector' commonly found in classrooms or offices. It would have replaced the Adler Planetarium's projector, last upgraded in 1969.

Are three former Fannie Mae executives "economic advisers" to Obama? October 9, 2008 No, claims made in a chain e-mail are false. Jim Johnson advised on non-economic matters but quit after a week. Franklin Raines says he took a "couple of calls" but was never an adviser. We find no evidence Tim Howard...

Is Obama's brother really dirt poor in Kenya and living on a dollar a day? October 6, 2008 CNN tracked down George Obama, and he said that he was "brought up well" and "live[s] well now."

How long have Obama and McCain been in Congress? October 3, 2008 Obama has been in the U.S. Senate since January 2005. McCain joined the House in Jan. 1983 and the Senate four years later. A chain e-mail that purports to show their time in Congress give a bogus comparison.