As you may recall Truman was extremely unpopular when he finally left Washington in 1953 thanks largely to the Korean War. Today however he is thought to have been a solidly good president a 'Near Great' even in the terminology of those surveys of historians they do every now and then.

Essentially I'm untrained so I just go with my imagination and try to put myself as solidly as I can into the shoes of whatever person I'm going to be playing.