1. It may be no big deal that Mueller had SDNY execute the search warrants, since it's not as if different parts of DOJ wouldn't share information, if it was helpful to another's investigation. But is it crazy to think one reason might have been this:
2. Mueller knew there was a chance Trump would try to fire him and close down the Special Counsel's investigation once he learned of the raid. Mueller couldn't be sure who'd then be able to safeguard or who would have access to the Special Counsel's office's files.
3. So perhaps Mueller thought it safer to have these very sensitive Cohen-Trump documents in the possession of another part of DOJ a couple of hundred miles away from Main Justice, where there'd be no easy way for Trump or his agents to get at them.
