If he is a legal resident of this country and has no felony record or been adjudged mentally incapacitated by a court of law then he has the same second amendment rights as every other citizen. Of course he also has to abide by all the silly laws, rules, regulations and petty bull that the rest of us have to abide by. No special consideration for him just because 52% of this country's voters thought he walked on water.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.