I would think in today's climate open windows and dome light but remember the officer can see you thru the rear window .
Every movement you make he sees and the more you move hands,arms and body the more concerned your doing something even reaching in the glove compartment for paper work all...
Seperate political and firearm .
The reason being if you get a good posting in a firearm thread it can go south fast when it starts to get political and the same as a good Hillary bashing can go all to heck when you start adding uncle Andy and state issues to the mix