Donald Trump is notorious for his decades-long habit of sending angry, hand-scrawled responses to his critics, including Gail Collins from the New York Times and Vanity Fair editor Graydon Carter. This week, MSNBC’s Lawrence O’Donnell joined the ranks of Trump critics to receive personal notes from the mogul, and O’Donnell takes it as an opportunity to air his list of grievances against Trump, including the fact that he believes that Trump’s much-vaunted wealth is mostly mythical, and that Trump is fundamentally un-serious as a candidate.

Watch the video, from MSNBC, below.

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