Come to think of it. I had the same problem. Just that it apparently wasnt as bad since I was capable of dealing with it. Mine leaned to the right a little. I figured out later that something was up with my drivers side rear wheel well. Turns out that they couldnt even rotate my tires cuz it was as if the compartment for it was smaller in width. I think my car was in an accident that never got reported to Carfax. Shitty. Anyway, as far your problem goes, have you check your power steering lately?