After the show FOX News vehemently denied sending Barnhart the email, and Barnhart has so far refused to release the email. Which would easily end the controversy if Barnhart is telling the truth.
Here is the tweet that set off the firestorm:
FOX News PR just emailed to let me know Glenn Beck will be raising fears on his show tonight...
Oddly enough, left-leaning Huffington Post has been trying to correct the record.
... Fox News PR denies ever sending that e-mail to Barnhart, and Barnhart hasn't responded to their requests to find out where it came from.
"We never sent anything to Barnhart and he refused to respond to us when directly asked who he received that from," a Fox News spokesperson said.
The distinction is important, as e-mails from the PR department can be perceived as on-the-record and thus legitimized as the network's official position on a subject.
Barnhart did, however, walk back the claim somewhat, calling it a "smartass comment" in his blog post about the Olbermann shout-out but still neglecting to say who had sent the e-mail.
The fact that Barnhart hasn't produced the email speaks volumes.