I was too young to personally experience Truman, to have any personal memories of him being born right after WWII. So, like you, most of what I know about Truman comes from books and documentaries. What few folks know about IKE is he had LBJ, then the Democratic senate majority leader over to the White House at least once a week or more to discuss how to get IKE’s agenda through a democratic controlled congress. A close working relationship between those two. JFK and LBJ both followed that up with a close working relationship with then senate minority leader, Republican Everett Dirksen. That type of close working relationship across the aisle wouldn’t be seen again until Reagan and Tip O’Neil and hasn’t been seen since. Both always got some or most of what they wanted while not getting all.
Then things, politics started going down hill to where we are at today. The polarization, the great divide and the super, mega, ultra-high partisanship. Today’s modern political era is totally disgusts me. I suppose that why most of my attention is on election forecasts and not much else political.