Who Is Pushing Impeachment Talk?

Democrats, obviously. Not denying that Sarah Palin and a few other outliers like the idea, but nobody serious on the GOP side wants that -- it's to take eyes of the Senate prize. But to prove the point, Nate Silver counts the actual numbers
The scoreboard so far in July: Fox News has 95 mentions of impeachment, and MSNBC 448. That works out to about 2.7 mentions per hour of original programming on MSNBC, or once every 22 minutes. 
As he points out, impeachment talk from Dems has Br'er Rabbit quality to it.