When I read the thread about this, the impression I was left with was that it might have been an error, but it was an operator or technician error and not a mechanical or software one. Somebody might have been pranking. The poster that noted this mentioned that somebody could possibly lose their job (at least their position) over the gaffe, even if not intentionally done.
Evidentally it was not a mistake, but some CNN employess expressing their political opinion on this administration. The phone operator who went even farther when they received angry calls was fired.