Farley/Greenwald smackdown

In a post I shared on the side pane a day or two ago, Greenwald worried about the implications of the domestic (and possibly indefinite?) deployment of a U.S. Army brigade. In it he discusses the apparent violation of the Posse Comitatus Act. In response, Robert Farley offered this stinging rebuke, noting that the PCA wasn't designed to safeguard democracy, but instead was enacted to safeguard southern white supremacy. Interesting exchange, particularly as I know very little about the legal and legislative history behind the applicable laws.