“How will he make the big Tweet when they are waiting for it?”
I think the big one comes after the big players are captured ... the guiltiest of the guilty + the ones with money. Once they’re in custody, the remainders will be nothing more than bonus apprehensions.
That tweet will cause the underlings to start scurrying. If the EBS message sounds dire enough to keep people in their homes and off the roads, it’ll be a piece of cake nabbing those attempting to flee. I can almost guarantee you that flights will be grounded, borders will be covered (the wall will help here, and I think Mexico is on our side), and anyone trying to get away by boat will have problems with the coast guard.
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Or the USN which has significantly more capability in that regard.