It is a fundamental principle of American democracy that laws should not be public only when it is convenient for government officials to make them public. They should be public all the time, open to review by adversarial courts, and subject to change by an accountable legislature guided by an informed public. If Americans are not able to learn how their government is interpreting and executing the law then we have effectively eliminated the most important bulwark of our democracy. That’s why, even at the height of the Cold War, when the argument for absolute secrecy was at its zenith, Congress chose to make US surveillance laws public.