Operational question, why do the DEA and ATF exist? It seems that they are A. Failures* and B. Lack any distinctive law enforcement mission. Couldn't we just roll their missions up into the FBI? Perhaps the Secret Service as well? This feels far more efficient than several fragmented failures occurring simultaneously.
*Eyeballing success by the number of murders with illegal firearms and drug deaths.
*Eyeballing success by the number of murders with illegal firearms and drug deaths.