I just added Presidents of War by Michael Beschloss to the Recommended Reading Section. It is considered to be one of the three must read political books published in 2018. (The other two are Leadership by Doris Kearnes Goodwin and Fascism by Madeleine Albright which are already on the list.)
In it Beschloss explores the actions of wartime presidents from James Madison to LBJ. The stories aren’t always pretty.