A spokesman for Sen. Harry Reid (D-Nev.) tells me that the senator is filing cloture on Harold Koh, the president’s nominee for State Department Legal Adviser, “right now.” Koh has been buffetted by attacks from conservatives, and Democrats hesitated to move on the nomination until they were confident they had the votes to confirm him.
UPDATE: Just spoke a little bit with Reid’s office. There’s confidence that Koh has 60 votes—that’s why they’re going ahead—and there’s disappointment that it came to this instead of some kind of a deal. “The Republicans would not agree to an up or down vote,” said a Reid spokesman. “We had hoped they would not block his nomination and would agree to move him by a regular majority vote.” Instead, they’re looking at a debate that could last several days.