This is why Donald Trump can not be president, like ever. Why does he even have the time or even care to catfight with celebrities? He should be writing books about foreign policy and economics, not twitter-talking birth certificates, college transcripts, rugs and plastic surgery. It's egomaniacal and distinctly unpresidential.

Besides, haven't we already been here before?

But alas, here we go again. To see the hurling tweets, visit: http://entertainment.nbcnews.com/_news/2012/11/14/15167389-cher-mocks-donald-trumps-hair-he-disses-her-plastic-surgery

Are twitter wars like 1940s alley fights?