When the Dubai company that the Administration had okayed to run several U.S. ports pulled out of the widely derided deal last week, the President escaped from a fight with a Republican-controlled Congress that had the public overwhelmingly on its side. In the long run, though, the company's withdrawal may turn out to mark the moment Bush became a lame duck. "The ports deal showed that the Congress is completely going its own way," said a presidential adviser. White House officials contend that Bush quickly realized the ports affair was a fiasco. "I know a prairie fire when I see one," the Texas rancher told an aide.