New congressional-State Department wrangle over Baghdad Embassy

WASHINGTON (CNN) One of the most outspoken congressional critics of the administration Friday demanded answers about problems with the biggest, most expensive U.S. Embassy in the world - still under construction in Baghdad, with no moving-in date on the calendar. It is months behind schedule and poses a big problem between the State Department and Congress.

Rep. Henry Waxman, D-Calif., fired off a new letter to Secretary of State Condoleezza Rice threatening to force Rice's second in command, Deputy Secretary John Negroponte, to appear before his House Oversight and Government Reform Committee with explanations and documents to explain why the project isn't finished.

State Department spokesman Tom Casey told reporters at his midday briefing that he hadn't seen the congressman's letter but that his requests will be considered.

–From CNN Producer Charley Keyes