If you are a billionaire or a Former POTUS or Vice POTUS I have to imagine they have two-step verification on their account. I have not attained near this level of wealth and notoriety and I have two-step verification on my social media accounts. Something smells!
Twitter has now suspended all verified accounts (blue check)
So President Trump cannot tweet now.
Now you know why the attack happened .
I think you may be over-estimaing their intelligence. ;)