Legislature Building with Branch

I can't avoid it; I always shoot this building when I'm in the city. A slightly wider lens (180mm?) would have been perfect here, I couldn't get further back to get more steps in. I could also swear it looks like I screwed up the verticals, but when I check them they seem actually straight. Optical illusion or maybe bad measuring (just using a computer straight-edge, e.g. the side of my browser window)... I don't know.