It's hard to know where to begin with this, less than an hour after you signed off from your Democratic presidential debate here in my hometown of Philadelphia, a televised train wreck that my friend and colleague Greg Mitchell has already called, quite accurately, "a shameful night for the U.S. media."It's hard because -- like many other Americans -- I am still angry at what I just witnessed, so angry that it's hard to even type accurately because my hands are shaking. Look, I know that "media criticism" -- especially when it's one journalist speaking to another -- tends to...