Did we read the same comment? Being interested in world events and/or the results of clinical trials conducted overseas is in no way "having [an] opinion on US politics."

(Not to mention that a Swede can have a very legitimate, personal, vested interest in what's going on in the US, maybe the GP had family vacationing in Vegas. - I had family vacationing in France during the Paris bombings, my mother-in-law called me up frantically that day.)