Ok, i am just joking i am sure Obama have his own phone lines by now but why not use Skype? It is clear, secure and cheap. The American president should try to save as much money as possible for the country. For example when he is traveling around the world he can get a Skype number in each country and connect to his cell phone and all his co workers can call him for free.
Skype also offers free to calls in USA and you do not even need to have a land line to use Skype you can be totally mobile.
If Obama used Skype Glenn Beck could not blame Obama anymore to spend too much money.
Try Skype now and get 15 % discount because you want to and not because Fox news told you so.