The State Department staff has recommended that Zelaya's ouster be officially labeled a "military coup," which carries with it significant aid cuts. It seems that Micheletti's latest refusal to negotiate was finally the straw that broke several camels' backs.
What I find interesting is the fact that State Department staff felt the need to make this leak:
"The recommendation of the building is for her to sign it," said the first U.S. official said of the 'military coup" determination, saying this was a response to the de facto government's refusal to accept a compromise that would allow Zelaya to return to power ahead of November elections.
This is purely speculation, but I have to wonder if the staff was fearful that the decision would get railroaded once pro-Micheletti lobbyists got wind of it. After this public declaration of State Department unity behind the decision, the administration cannot back out on it without looking foolish.