It depends on whether it was true or not.
In this case, nobody told any one that Carson was dropping out. That is a myth. They only repeated the CNN story about the trip to Florida and not to New hampshire or South Carolina.
I hope Cruz staffers are smarter than to leak such a potentially damaging set of facts to CNN while the caucuses were still ongoing. You do such a dub thing, you might expect that the consequences might not be happy ones.
The Cruz team IS that dumb and evil!