"All lies and jest, still a man hears what he wants to hear and disregards the rest."I still can't precisely define in my mind what the term "gaslight" means, as it seems to have become a refuge word just like "fascist" when a person who opposes another has no actual facts or no cogent argument to make. It's sort of a "they are my marbles and I am taking them home" adapted to the 2020's.
The fact is that Bezos owns the newspaper. There is no greater authority except for laws and regulations that apply to everyone; there is no law against an owner of a newspaper saying, "I don't agree and I don't want to do that" and stopping an editorial from being published or an endorsement from being made... in his newspaper.
The correct way of writing what you said, "WaPo was on the verge of endorsing Harris," really means "the editorial staff of the WaPo wanted to endorse Harris but the owner of the newspaper disagreed and would not let them".
And, as far as I can tell, Bezos' only contribution to Trump was not to the campaign but to the inauguration (which occurred after the campaign and election were over).
Believe what you want, David. Gey gezunda heit. (Google it.)