Why not just tell us what it says?
The gist of it is that a blogger (who is mostly reputable as a news source, but he’s relaying unverified info) screenshotted some 4chan postings claiming to be from an anonymous white house staffer with access to secret service people in executive protection in the white house. The anon claims Trump is going to push things to the limit, possibly allowing Pelosi to assume the role of the presidency (in part because it would require her resignation from the house) and force the supreme court to take a case and rule on the merits.
Most of what gets posted to 4chan that looks like a “leak” or “insider” ends up being fan fiction. The anon poster doesn’t use lingo of a white house staffer which to me is a dead giveaway that this is fan fiction, white house jargon is a shibboleth, people in that business all use the jargon to distinguish themselves as important. Whatever it is, it’s an extraordinary claim, and extraordinary claims require extraordinary proof.