

You’re right about the smooth bit. Don’t know how that happened.
In any case, operator isn’t necessarily negative, neither is political operator. It can be and often is, but not necessarily. I often see it being used as a compliment.
I did a google, here’s an example from NPR, which is clearly complimentary:
Street — who calls Obama “one of the biggest celebrities on the planet at the moment” — notes that he is “always able to put a distance between himself and whatever performance he’s giving. He knows he’s playing a game. He knows this is a bit of light relief, a bit of entertainment, but he keeps his dignity … and that seems to me a very clever trick. It speaks to him as a very sharp political operator.”






The comment above which started this discussion was complementary, and you admitted as much in your reply to it.
Others have also said and provided examples of the phrase sometimes being complementary.
You yourself moved from saying:
To:
Ie. sometimes it is positive.
You were wrong about a phrase sometimes having a different connotation, it happens, who gives a shit?