His worst liability is not coming out full throttle against obama.
That's all he has been doing.
Top three entries. Which is his worst liability. Bain, tax havens, or tax returns.
Obama's bald face lies about Bain have been completely debunked so we can cross that off the list.
Tax havens are legal so that can't be a liability.
He has disclosed some tax returns and if there was even a slight error on any of his other returns, Obama's IRS would have nailed him by now.
Moving right along.