There will be a CFIUS review after acquisition closes. Because of the "fake memo" that went around, government is aware someone or some group is trying to manipulate the stock. By announcing a CFIUS review after the deal closes, the stock price will not dip immediately and the short seller won't gain. At the same time, the government can conduct their due diligence on the deal and risks.
I don't care. I'll be laid off and I'm walking away with my severance.