The new federal crackdown on medical marijuana announced on October 7 by California's four U.S. Attorneys sent chills through the industry. It was a stunning reversal by the Obama administration. While legal weed grew to an estimated $10 billion to $100 billion industry — no one's quite sure of the exact figure — activists noticed an alarming undercurrent to the rhetoric: Raids on growers and dispensaries actually increased under President Barack Obama.