The urgency to make The Post was because of Trump's administration
Snip
The level of urgency to make the movie was because of the current climate of this administration, bombarding the press and labelling the truth as fake if it suited them, Spielberg tells me, recalling the sense of offence he felt at documented, provable events being branded fake news. I deeply resented the hashtag alternative facts, because Im a believer in only one truth, which is the objective truth.
So The Post shows a silhouetted Richard Nixon pacing the White House, while we hear the disgraced former presidents voice taped on his own, notorious recording system as he tramples on the first amendment, seeking to use the might of his office to hobble the free press. No one needs to mention Donald Trump for his shadow to loom over this movie.
More: https://www.theguardian.com/film/2018/jan/19/steven-spielberg-the-urgency-to-make-the-post-was-because-of-this-administration