That was quick

Nancy Pelosi made an accusation against Bill O'Reilly, then immediately ended any further need for discussion by invoking Godwin's Law.

“While we may disagree with people and we think they are wrong, we shouldn’t think they are bad and we shouldn’t ever use the word hate in context of people unless you’re talking about Hitler or somebody like that,” Nancy Pelosi told Gayle King.

Godwin's Law:

[T]here is a tradition in many newsgroups and other Internet discussion forums that once such a comparison is made, the thread is finished and whoever mentioned the Nazis has automatically "lost" whatever debate was in progress. This principle itself is frequently referred to as Godwin's law.