Pat Buchanan hasn't appeared on MSNBC since he started promoting his controversial book Suicide of a Superpower: Will America Survive to 2025? and now Buchanan says he's officially done with the liberal network, citing an "incessant clamor from the left" for what he calls censorship.

Both MSNBC and its former resident conservative commentator seem to view each other with equal disdain at this point, a change from when Buchanan joined the network in 2002 when it did not lean quite so sharply to the left, The New York Times' Brian Stelter points out. Deadline Hollywood reminds us that "in January MSNBC president Phil Griffin said the ideas expressed in Buchanan’s book put forth 'aren’t really appropriate for national dialogue, much less the dialogue on MSNBC.' " In an essay on The American Conservative's website on Thursday, Buchanan charged the Anti-Defamation League (which has criticized his book as anti-Semitic) and other advocacy groups with trying "systematically to silence and censor dissent," and MSNBC of capitulating. "In the 10 years I have been at MSNBC, the network has taken heat for what I have written, and faithfully honored our contract," he wrote. "Yet my four-months’ absence from MSNBC and now my departure represent an undeniable victory for the blacklisters." Confirming Bucghanan's departure, an MSNBC spokesman told Stelter, "we wish him well."