Not a question that you're likely to hear during Barack Obama's official duties - however this one came up at a youth meeting while he was promoting he healthcare law.
Obama state's that "security reasons" are why he's firmly gripping his BlackBerry instead, although he does concede that his daughters do use iPhones.
Security is a touchy subject for the US Government at the moment - especially with Edward Snowden's allegations that Apple is one of the companies that have allowed the NSA to access their servers.
There's no doubt that the US Security Service are likely to be scrutinising their tech security even further to avoid being the victims of similar infiltration methods. Reaching to BlackBerry still remains the strongest security in their eyes.