President Barack Obama signs the Affordable Health Care for America Act during a ceremony with fellow Democrats in the East Room of the White House on March 23, 2010 in Washington, DC. North America/Getty Images

One test of a nation-changing law is that it remains a centerpiece of American life and Washington’s pitched political fights long after the president responsible left office.

Franklin Roosevelt’s New Deal still supports millions of citizens every day 90 years after he signed the Social Security Act.

Lyndon Johnson’s Voting Rights Act is still hanging on, just, despite Supreme Court decisions that watered down its protections for minority voters. The law remains a lightning rod in political disputes six decades after its passage.

President Franklin Delano Roosevelt addresses

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