He does quite a bit better at rallies. I believe some of these press conferences catch him at times when he is more tired, and the subject matter is also differ

He does quite a bit better at rallies. I believe some of these press conferences catch him at times when he is more tired, and the subject matter is also different (less rehearsed, less stump speech-y) and dryer than his rallies so his charisma level seems a bit lower