CLOSED: Western Kingbird?

Could this be a Western Kingbird? That's the closest I think I can find in Sibley's. Would be a bit out of its territory as it was seen today in the vicinity of a bunch of Eastern Kingbirds in Illinois.

Eastern Kingbird on the right

Fuzzy closer shot. You can see the white under the beak.

Last one.

Agree with Western Kingbird, nice catch! I would say he strayed a bit. lol

Yep, Western Kingbird. White sides to the tail visible in pics 2 & 3. In pics 1 & 4 it almost looks a bit Cassin's-like with the pale tail tip, but that would also have a greyer throat.

Resin

You know, I saw the Cassins, but that is WAY out of range.

thanks