Political Junkie: Iowa's Caucus Countdown
Ken Rudin, NPR's political editor, talks about the upcoming caucuses, and Sen. Joe Biden (D-DE) discusses his campaign in Iowa. Also: a new poll shows Barack Obama leading the pack, and former White House press secretary Scott McClellan authors a "tell-all" book.
Sen. Joseph Biden (D-DE), senator, and Democratic presidential candidate
Paul Kirk, chairman of the Commission on Presidential Debates
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