Dr. Ben Carson has now become the top target of the leftist media. They’re dumping as much opposition research on him as they can find, no matter how shoddy. That’s not unusual: the media do this routinely to members of the right. On this morning’s Morning Joe, Joe Scarborough and Nicole Wallace both attacked Carson viciously, even as Scarborough idiotically insisted that media bias had nothing to do with the attacks. Mika Brzezinski joined in as well.