This issue came up in the copyright forum a few times.

It has to do with the fact that one is a public figure as in politician, and the other is a public figure as in "celebrity".

Let's use Arney for a moment.  Before he became a politician, yes he was in the public eye, but he was just a celebrity, so making a look-a-like using him and tagging his name to it was a copyright no-no because even though he was a famous celebrity he was still just another private citizen.  But now that he is in the public eye as a politician his likeness is now public domain, meaning you can make a look-a-like and tag his name to it.

However, if he ever goes back to being just a "celebrity" and no longer a politician, I believe it all reverts back to  copyright no-no because he is just another private citizen then. However, I think anything that was done while he was in the role of politician would still be ok.  But Im not entirely sure of that so you better ask about this area in the copyright forum.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi