Scholars trace the importance of the first 100 days back to the presidency of Franklin D. Roosevelt, whose swift action in the first months of his term to combat the Great Depression made his administration a standard by which presidents have since been held.
He passed 76 laws, according to FiveThirtyEight, rapidly pushed through legislation that gave the government the power to regulate the stock market, set the minimum wage and close American banks for a bank holiday. In a radio address after his first 100 days passed, Roosevelt used the phrase “first 100 days.”
Since then, administrations, political commentators and the media have looked at the amount of legislation a president has passed, the effectiveness of actions taken and public perception and compared it to the standard set by Roosevelt.