"This NY Times story points the way to a fig-leaf:
'The administration's review of the deal was conducted by the Committee on Foreign Investment in the United States, a body that was created in 1975 to review foreign investments in the country that could affect national security. Under that review, officials from the Defense, State, Commerce and Transportation Departments, along with the National Security Council and other agencies, were charged with raising questions and passing judgment. They found no problems to warrant the next stage of review, a 45-day investigation with results reported to the president for a final decision.
However, a 1993 amendment to the law stipulates that such an investigation is mandatory when the acquiring company is controlled by or acting on behalf of a foreign government. Administration officials said they conducted additional inquires because of the ties to the United Arab Emirates, but they could not say why a 45-day investigation did not occur.'
There you go - the law may have required a 45-day review, so let's have it."
Didn't I just read somewhere that a review would be a deal-breaker under the purchase agreement?