[G-Oil Guy]

I think you're in the clear.

1. You're not discussing a political position
2. You're not trolling or blasting a particular political party
3. You're not claiming your politics are better than anothers.

You are simply commenting on the absurdity of a nickname that just happens to belong to a politician.

And to keep this on track: I completely agree. We don't typically call politicians by a nickname. They're not celebrities out partying, these are the people vying for the chance to run our country. Show some damn respect (even if you don't agree with them).