Presidential Approval Ratings for Different Presidents:
Recent news on President Bush's poll numbers led me to google around to see what kind of approval ratings different Presidents had for the lengths of their Presidencies. I came across a very cool WSJ site from 2006 that features this chart: Presidential approval ratings from 1945 to the present. To focus on the ratings for individual Presidents, just click on the name on the left-hand column. For an updated chart for President Bush, see here.