I doubt if a film made in 2004 or after about Andrew Johnson would be as kind as this 1943 film. Johnson did support the North in the Civil War (he was the only Southern Senator to remain in the U.S. Government during the war, and would be appointed Governor of that portion of Tennessee from 1863 - 64). Lincoln, in order to have a strong National ticket in her 1864 election chose Johnson (a Democrat)as his running mate. So Johnson became Vice President. And then John Wilkes Booth shot Lincoln, and Johnson became President.
Johnson was illiterate, until his wife taught him to read and write. He educated himself, and rose in the legal and political world of Tennessee (and then the nation). But he was a piece of "po' white trash", and remained so with all it's cultural baggage. He supported the North because he (rightly) distrusted the Southern plantation aristocracy (epitomized by Jefferson Davis). However - he hated slaves and free Black people. Hence his willingness to be soft on the South. Lincoln would have been soft too, but Lincoln had great gifts at managing his adversaries and probably could have arranged a compromise. Johnson was pig-headed. He antagonized the Radical Republicans controlling Congress. They waited for him to make a mistake, and he did (technically he violated the Tenure of Office Act, by firing Secretary of War Stanton without getting Congressional permission - this act was declared unconstitutional in the 1880s). Then followed his impeachment and the saving of his skin by seven Republican Senators who voted not to remove him. And those men all lost their Senatorial seats.
In 1943 Johnson was considered a hero, for saving the Executive Branch from becoming a rubber stamp for Congress. Actually, there was nothing to show that some Radical Republican President could not have restored power to the Executive Branch if Johnson had been removed. He gets high grades for his grit and courage, but his pig-headed stupidity and racism sink his historical rating.
Still Van Heflin, Lionel Barrymore, and the other actors (like Charles Dingle) make the film interesting and enjoyable enough. Good film making but mixed history. Two final points: Edmond Ross was in good health when he voted, but James W. Grimes of Iowa also voted for acquittal, and he had a paralytic stroke a few weeks earlier (he died within a year). Second: Andrew Johnson is the second Vice President of the name Johnson (and Lyndon Johnson the third Veep). The first was Martin Van Buren's Vice President, Richard Mentor Johnson of Kentucky, whose career as a politician might make a diverting comedy.
