CSPAN @cspan
#1 in C-SPAN's Historians Survey of Presidential Leadership, Lincoln required the most amount of security for a president up to that point, as described by biographer Harold Holzer. Learn more in C-SPAN's newest book, "The Presidents." https://t.co/iTOhaOBAeb #presidents https://t.co/WJf39UtFot — PolitiTweet.org