Is it possible to Cold Brew using an Aeropress? Is it possible to cold brew using Aeropress?

My inclination says yes, in a similar fashion to cold brewing with a French press.  However, when I tried it, it became very hard to plunge.

Aside from working on my arm strength, what tricks or methods can be used to ease that process?
Don't brew in the Aeropress itself. Brew in a jar like in classic methods and use the Aeropress only for fast and easy straining, taking care not to stir up the grounds from the bottom of the jar as you're pouring. Most of the coffees you strain out this way should be an absolute breeze. Only the last one you make (assuming a bigger jar) should give you any plunging force trouble, and that's if you insist on getting every last drop out (I know I do).