Either the USA is "Team America - World Police" or it's not. You can't have it both ways. Either nab Assange and pony up the money Ukraine needs, and preferably tell Israel to go fuck themselves, or don't do any of those things and keep yourself out of everyone else's business.
Let me be crystal clear on one thing: America wants to be seen as world police. It's anything but. America is bullying governments and countries all over the world to pursue their own interests, not in an hypothetical search for justice.
They didn't lift a finger when Russia invaded Georgia for example. Or when China invaded Tibet. There are countless examples of this.
So, to answer your question, no, the USA is not "Team America - World Police" and has never been.