Pat Buchanan, the conservative political commentator, announced Thursday his "days as a political analyst at MSNBC have come to an end." In an essay, he cited "an incessant clamor from the left" as the reason for his departure.

It’s unclear if Buchanan was fired or if the final decision to leave was his own but MSNBC suspended him last October and he has not appeared on the network since. MSNBC President Phil Griffin said last month that he didn’t think Buchanan’s latest book "Suicide of a Superpower" that contains chapters titled "The End of White America" and "The Death of Christian America." "should be part of the national dialogue, much less part of the dialogue on MSNBC."

A spokesman for MSNBC told the NY Times, "After 10 years, we’ve parted ways with Pat Buchanan. We wish him well."

"A group called Color of Change, whose mission statement says that it "exists to strengthen Black America’s political voice," claimed that my book espouses a ‘white supremacist ideology.’ Color of Change took particular umbrage at the title of Chapter 4, "The End of White America," Buchanan wrote on his syndicated column.

ColorOfChange.org launched their campaign calling on MSNBC to fire Buchanan after his appearance on a show they say has a history of being a white nationalist radio program. More from ColorOfChange.org:

ColorOfChange.org launched their campaign calling on MSNBC to fire Buchanan after his appearance on white nationalist radio program The Political Cesspool, where he promoted his latest book. The Political Cesspool describes itself as representing "a philosophy that is pro-White … We wish to revive the White birthrate above replacement level fertility and beyond to grow the percentage of Whites in the world relative to other races." The show has a reputation for being racist, sexist, anti-gay, and anti-Semitic. In calling for his firing, the group also cited a long history of bigoted rhetoric from Buchanan.

ColorOfChange.org was joined in their campaign by CREDO Action.The two groups collected over 275,000 petition signatures calling on Buchanan’s firing. In addition, members made calls to MSNBC demanding that the network cut ties with Buchanan.