I read a piece of a biography on Gerald White Johnson, and it mentioned how one advantage of him writing these three books for children was that he was able to avoid accusations of lack of research, skipping over important pieces (that are not in-line with his narrative) and being politically motivated.
This book shows a clear lack of research, and the author (Johnson) only mentioned the pieces of history that he felt exulted Presidents Wilson, Roosevelt and Truman. In fact, the last book left off with some Woodrow Wilson Worship (WWW for short). It led pretty quickly to Franklin D. Roosevelt Worship, but in between was some accusation, without any reasoning - just him saying it, that Presidents Coolidge and Hoover weren't wicked - just stupid. And he ends with saying that President Eisenhower, who was a good President, didn't really do anything important. And he gives no justification.
AND the author spent quite a few pages trying to justify stupid crap that his Democrat Presidents did. And he also tries to argue again, even though he did in the last book, that the Republicans are at fault for WWII because they didn't agree to join the incredibly faulty League of Nations. But President Wilson did sign the agreement, without Congress, to apply the sanctions they did to Germany. AND the author mentions how President Roosevelt did a bunch of that he technically didn't have the authority to do, like declare that all the banks in the country would be closed for over a week so the government could inspect them all, but then says that it was good because it needed to be done.
This series started out okay, but each book became more and more just a bunch of political propaganda. EVERY Republican President was at one point or another labeled stupid and without any justification whatsoever. And then he said things like disagreeing with the Democratic viewpoint is un-American. He did, fortunately, mention some of the things that people disliked about President Roosevelt, but it seems that he did that only to give him reason to provide justification. Seemed like he was trying to be defensive.
Anyway, I am disappointed with the 1961 Newbery committee for choosing this book. It is clear that they agreed with his viewpoints, but an innacurate 'history' book that seems very politically brainwashy, (and yes, Peter was only 10 at the time of publication), shouldn't even be a consideration.