So far the evidence is anecdotal, and the anecdotes tell us that the U.S. government is attacking gun sellers by pressuring banks and payment processors to stop doing business with them. However, we may be getting more information about the extent of that program. According to DailySignal.com, there's a telephone survey underway. See Ready, Aim, Fire: Choke Point Draws Heat From Gun Industry:
The National Shooting Sports Foundation, which exists to protect and preserve hunting and the shooting sports industry, is conducting a phone survey of over 7,000 of its members to determine the extent to which Operation Choke Point is affecting their industry.
Note that this tactic of cutting off bank access is the same one threatened by the U.S. to punish Russia for aggression against Ukraine.
It's a shame that President Obama thinks no better of Americans in legitimate businesses than he does of Russia. But there's something bigger going on. Obama thinks citizens should be unarmed. And that's very scary.
Update 1/29/2015: FDIC says it will stop targeting legal businesses. Exclusive: FDIC Changes Tactics in Response to Operation Choke Point.