Have you noticed that some laws seem to settle the matter in question while others do not? Some expected Republican President Dwight Eisenhower to reverse Democratic President Franklin Roosevelt’s sweeping New Deal initiatives, including Social Security, but he did not. President Richard Nixon accepted his predecessor President Lyndon Johnson’s vast expansion of the welfare state with Medicare and his war on poverty.

But Obamacare? Not so much. Even though the bill came into law in 2010, Congress has held more than 70 votes to repeal it in whole or significant part, and dozens of court cases have continued to challenge it, including the recent decision by a federal judge in Texas to declare it unconstitutional as revised.