Fox News has never been shy of hosting guests who compare Obama to Hitler and the Nazis. According to Fox pundits, the president's alleged Nazism ranges from promoting gun control to mandating contraceptive coverage for employees.
However, Fox took a different approach to Nazi allusions when CBS's Bob Shieffer compared "taking on the gun lobby" to "defeating the Nazis." TPM has put together a video of Fox reactions, including Sean Hannity calling Shieffer's comparison an "over-the-top defamation":
Note that comparing the president to Hitler is nothing new. Comparisons between Bush and Hitler abounded on the left throughout his presidency.