"Pray tell, whose side is this man on? When was the last time you had to ask that question about a president-elect?"

Trump is in it solely for himself, just as he has been his entire life. He has no loyalty to his country, no loyalty to his numerous wives and mistresses, no loyalty to his business interests which walks away from as they continually go bankrupt, no loyalty to the military which he dodged four times so he could chase skirts (resulting in four working class Americans going to Vietnam in his place), no loyalty to his business partners whom he invariably stiffs, no loyalty to his employees whose wages he withholds, no loyalty to anything. Nada. Nothing. 

I doubt he's loyal to Putin, although he's certainly grateful for the assist (it works both ways; Putin has no loyalty either, he just recognizes a useful idiot when he sees one).

Trump is seventy years old. The entire story of his life is going all in for himself and nothing else. Why should we think he has changed?