it is summer (August) it is HOT, near 100 degrees here, a cool, beige suit is, to me, pefectly appropriate. Why would anyone wear a black or dark blue suit under these conditions???
Because you are president of the united states and fashion wise, Dark suits and plain ties are typical of what is considered "power suits", and the expected attire of anyone in the position as this current leader of the world.
Taking your question to the extreme, would you feel ok with B. Hussein had he worn shorts and a Hawaiian floral shirt when he gave this press conference?
Of course you wouldn't..............there is a time and a place for certain presidential attire, but anything other than a dark suit and tie when presented to the cameras of the U.S. and the world is a disgrace to the office.........
maybe because dark blue is the color of professionals....??