Summary of the changes in the president and vice president for the United States of America.
potus - President of the United States
party - Political party of the president
start - Start year
end - End year
vpotus - Vice President of the United States
Source
Presidents of the United States (table) -- infoplease.com (visited: Nov 2nd, 2010) http://www.infoplease.com/ce6/history/A0840075.html
Use the following R code to directly access this dataset in R.