All the presidents

I have heard this movie described as a good movie, that could have been a great movie. It features the civil rights movement through the eyes of a butler in the whitehouse. A potted history of the USA since the second world war. Hollywood loves to eulogise its presidents. However the portrayals can only be a snapshot of time and for me this was just a bit too shallow. But what could they do in 132 minutes? Gerald Ford and Jimmy Carter are over in seconds! So not sure what happened there. It definitely plays on the heart strings and Oprah is surprisingly good in her role too.