Media bias is lived with daily

It grows tiresome to constantly be checking your wristwatch to see if it's still running. But you have to be aware of the machinations of your chronometer's health or you just may very well get caught believing a lie.
That's the way our media are. We've got to always be doing reality checks on them so that misperceptions don't creep into our brains.
Powerline reminds us why we scrutinize.