By Troy Anderson and the Battle Ready News Team. A Century of Significance: Why the First 100 Days MatterThe idea of a president’s first 100 days as a benchmark for effectiveness began with Franklin D. Roosevelt in 1933, when he pushed through a wave of New Deal legislation to combat the Great Depression. Since then, every commander-in-chief has been measured against that standard. But rarely—if ever—has any leader in American history made the kind of seismic spiritual, economic, and political impact in just 100 days that President Donald J. Trump has during his second term.