The policy was changed more recently than that. When Woodrow Wilson made his Pilgrimage of the Heart to Carlisle in 1918 he had only one bodyguard.
When fact checking this I also found out that he visited on Black Eye Friday, the last Friday before Christmas, which is infamous for the amount of people who take advantage of work finishing early and are drunk and belligerent well before sunset. I don’t know how much the state brewery reduced the violence…
