Trump is enamored with Putin. He wants to be just like him. Trump would like nothing more than to be in total control of this country and to be able to "take care of" anyone who stood in his way.
Definitely Yes Putin has something over Trump. Remember back to Helsinki? they both came walking out from the back. Putin was all bouncy and happy, while Trump held his head down, was not smiling and seemed to be in a bad mood. Putin is hanging something heavy over Trumps head and Trump was not happy about it when they both emerged. And now with all of Russias meddling into our systems, Trump does nothing, absolutely nothing. Putin has something over Trump that makes Trump impotent to any action or reaction.
I don't think he is because in Trump's mind him and Putin are best freinds and Putin has a lot of respect for him. So Trump believes Putin would never hurt or cross him. Cheers and happy weekend!