I am sure Bush knows, but I am not sure about Powell.
My observation is that the statements released by the White House were very carefully crafted, to approach the situation with the necessary care. Then Powell comes along making a statement, which may or may not have been approved by the White House, declaring the election in Ukraine invalid, but then went on that he talked with the Russian minister and are working on diplomatic resolution.
Yushchenko calling for a strike doesn't sound like a peaceful solution to me. I think the international community may have emboldened the Opposition.
At the first news, Yuschenko said the people would have to take to the streets and fight, while his opponent said he did not want to win on a crafted vote.