This movie is a bit long at over 2 hours but is written, acted, and directed in a style that is interesting all the way. There is quirkiness, sometimes it reminded me of Wes Anderson's movies, like "The Grand Budapest Hotel." The character played by Christian Bale, a disheveled doctor who lost an eye in the war, reminded us of Peter Faulk's 1970s TV series Columbo in his mannerisms and his quest to find out facts.
While this is almost entirely a fictional story it is loosely based on something that was called "The Business Plot." Roosevelt was newly elected and a group of businessmen didn't like the direction things were headed. So they hatched a plan to overthrow the President.
But very little of the running time is actually devoted to that, most of it has the three main characters, accused of murdering a woman by pushing her into the street to be run over by a delivery truck, working to prove their innocence and to focus in on the real bad actors.
My wife and I watched it at home on DVD from our public library, a totally interesting and entertaining take on the times.