Cascadia is also trying to convince the new leadership to openly permit emigration upon assuming full power, we don't want this massive evacuation to actually be necessary as it is now. And, of course, there's my note to President Shady asking if he can influence the Misterian Communists, but he's too busy attending parades.

The absolute last thing we want is for this situation to go kablooey.
Edit: Pollux, I missed the airspace thing. Interfering with helos trying to clear things up at our Embassies is not going to be as tenable as forbidding ships to depart. And frankly both are risky as hell for your new regime. Too many nations are interested in getting their embassies out due to the chaos and blockading Empyrean City to forbid ships from departing without giving them any mechanism to be permitted to exit is going to make things worse.