Looking over their shoulders

Amidst another "Mexican Canard", Josh Sugarmann drops this little steamer into the Huffpo bowl:

this is the organization that for years to infiltrate the gun violence prevention movement

Which means they're still paranoid that there might be more but they just don't know. Could it be someone in the office? One of the people they've communicated with via internet?

Generating this level of stress made everything Mary did worth it.

Of course Josh is always wont to mention that his people do the same things.