Lowering Corporate Tax Rates

Despite a few years of various elected officials and business groups noting that the US corporate income tax rate is surpassed only by the rate in Japan, the rate remains unchanged.

I've got a short article from the AICPA Corporate Taxation Insider on the background and prospects for lowering the rate. It includes a brief summary of a few proposals offered to lower the rate.

What do you think should be removed from the base, if anything, to help lower the corporate tax rate?