I don't remember hearing about this at the time (2014)
https://www.thedailybeast.com/michael-scheuers-meltdown
"Scheuers career reached its terminal nadir last week, when he published a column endorsing an assassination of President Obama and Prime Minister David Cameron. In the modern media environment, its pretty hard to go too far. Advocacy of murder, however, does cross one of the last remaining lines. These words from the same column cross another:
That Eric Holder and Barack Obama have not been impeached, moreover, suggests that the impeachment provisions of the Constitution are a dead letter; that they apply only to individuals named Nixon; or that they do not apply to black Americans supported by such towering giants of fatuousness as Oprah, Chris Matthews, Fareed Zakaria, Piers Morgan, and Hillary Clinton and her motley band of Viragos.
I dont expect we will be hearing much more in future from the former CBS News analyst, bestselling author, and CIA officer."