Back-to-back, back-to-back

Mader Blog asks: When was the last time a two-term President of the United States was succeeded by another two-term president (as would be the case if Bush were re-elected and served out his full term)? The answer may surprise you. BONUS QUESTION: The Canadian equivalent would be: When was the last time a Prime Minister who won back-to-back majorities was succeeded by another Prime Minister who won back-to-back majorities? (For the answer, click on Comments.)