- Maybe it's because his name isn't as classically American as, say, Mitt Romney's, so writers and editors get confused about which is his first name and which is his last.
- Maybe it's because the media are worried about another Obama/Osama mixup, so they are switching to his first name to be safe.
- Maybe it's because we see more politicians, entertainers and athletes referred to by their first names in headlines and other display text. (See here and here.)
- Maybe it's because someone just screwed up.
And I am a little worried that Romney's net worth may be as low as $190.01