CNN's Brian Stelter and Bill O'Reilly are going at it like a couple of school girls on the playground.

O'Reilly called Stelter a "cheap shot artist" and Stelter countered calling the Fox News Anchor a "name caller".

Stelter even took to Twitter with his comeback to O'Reiily

Of course this is about as good of a comeback as George Constanza's "jerk store".