Chicago Mayor Rahm Emanuel is scheduled to sit down with late-night talk show host David Letterman.
Emanuel is to appear on the "Late Show with David Letterman" on Monday night. The show tapes in New York. The mayor is to talk about the upcoming documentary "The Presidents' Gatekeepers." It's a two-part Discovery Channel special that airs this week and features former White House chiefs of staff. Emanuel was President Barack Obama's chief of staff before he became mayor of Chicago. He appears in the documentary.
Democratic Illinois gubernatorial candidate Bill Daley also served as Obama's chief of staff. Daley also appears in the documentary.