I've been saying this for many years now: Putin is one of the best politicians / strategists / leaders to currently walk the face of this earth.
There is no comparison to him anywhere (maybe Merkel comes close) and especially in the USA. Obama wasn't a match for him, Trump is definatelly not, Hillary definately not, Sanders lol. All in all USA doesn't have a politician in his magnitude and it didn't matter who won the elections. Noone was capable of facing him.
I completely agree with Bloomberg's view but i'll take it a notch further. He is a symbol of power period.