It's nothing to do with the US presidency
Arm + Aged (man) + Don(ald)
Old man strong versus old man dumb?
the pictures show: 1. strength 2. old man 3. dumb man
Old MacDonald had a farm.
Picture 2: Old, Picture 3: Donald, Picture 1: f(arm)
Power before age
Strength comes before age, and it trumps it!