It is, but its canny that Twitter can still ping data from an untraceable device. That means they are using protocols to intentionally bypass normal firewalls and coding over cellular data networks that he has set on his devices. It also means it was possibly set up before he came into office, when Obama was still in. So when he accesses their servers, he's being monitored just like me and you. Which is principally why i don't use it also.