Chris Matthews an Authority on Negative Campaigning and Wing-Nuts

Tonight, on MSNBC’s “Hardball” show, Chris Matthews says he “can’t stand” negative campaigning, from Republicans or Democrats. But earlier in the same segment he repeatedly calls right-wing conservatives “wing-nuts.” His Democrat strategist guest was more honorable. Even he couldn’t  call them wing-nuts, after being pressed to do so by Matthews.

Who’s the real wing-nut here?