The country learned this week that the Drug Enforcement Agency spied on all of us first, and with even fewer privacy protections by some measures. But if anyone is surprised that the DEA's mass surveillance programs have been just as aggressive as the NSA's, they shouldn't be. The early targets that signal shifts in America's domestic surveillance techniques aren't activists and political dissidents, as some privacy advocates argue—or terrorists, as national security hawks would claim. They're drug dealers.

The DEA's newly revealed bulk collection of billions of American phone records on calls to 116 countries preceded the NSA's similar program by years and may have even helped to inspire it, as reported in USA Today's story Wednesday. And the program serves as a reminder that most of the legal battles between government surveillance efforts and the Fourth Amendment's privacy protections over the last decades have played out first on the front lines of America's War on Drugs.