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Franklin D. Roosevelt invented the idea of a president’s first 100 days. Roosevelt was actually referring to the first 100 days of a special Congressional session to fight the Great Depression, as Robert Speel of Penn State notes. But the idea soon came to mean the 100 days that start on Jan. 20 and that, for President Trump, will end on Saturday.
No doubt, you’ve seen a torrent of coverage in recent days of the milestone. And while it’s certainly an arbitrary milestone, it’s also a meaningful one. Presidents are at their most influential in their early months, which makes that period a particularly important one for a presidency.