Identify raptor by tail in Chicago (2 Viewers)

[Harrier22]

I watched a raptor circling over a pond near Lake Michigan and while I could not see any of its coloration, I did note that the tail feathers were not fanned out but rather drawn together to form a rectangle.
What bird was this?

 

[THE_FERN]

We could guess but to be honest it's impossible to say for sure. Depending on circumstances, even raptors with rounded or forked tails can hold them in a way that makes them appear squared.

 

[Butty]

the tail feathers were not fanned out but rather drawn together to form a rectangle

Every raptor except those with either a forked or pointed tail can do this, so, on its own, it's not an ID feature.

a raptor circling

Knowing whether it was flapping, gliding or soaring might help but still won't give you an ID.

 

[Harrier22]

the bird was gliding, making a couple of large circles then gliding out of sight

 

[Andy Adcock]

the bird was gliding, making a couple of large circles then gliding out of sight

Most raptors will do this so again, nothing diagnostic here.