Yes, if you know how to do it is easy. But by you asking, I would asume you don't know. It becomes a difficult proposition right there. The AC normally is wired directly from the electrical box from a 20 amp breaker. You can feed it from there. Also, there is a junction box inside the AC unit. you can feed it there.
There is nothing difficult unless you have 2 AC units with a power management system.
Still, this is not like fixing the light in your car. 110V at 15 amps will cause a lot of damage and easily kill you if you don't know what you are doing.