McCain faults paper for not releasing Khalidi tape

Khalidi is a professor of Middle East Studies at Columbia University and a longtime friend of Obama's. Khalidi has publicly criticized Israel, but he and Obama have both said they hold very different opinions on Israeli issues.

McCain also has ties to Khalidi through a group that Khalidi helped found 15 years ago. The Center for Palestine Research and Studies received at least $448,000 from an organization that McCain chairs.