To pass a tax bill with just fifty-one votes in the Senate--rather than sixty--the Republicans must keep the over-all cost of their proposal to $1.5 trillion over ten years. Even when allowing for a one-year delay in implementing the corporate tax cut, the business provisions of the G.O.P.'s plans swallow the lion's share of that sum. According to an analysis of the Senate Republican
s' plan that the Joint Committee on Taxation released on Thursday, cutting the corporate tax rate to twenty per cent starting in 2019 would cost $1.33 trillion by 2027. The Senate's version of the tax cut for unincorporated businesses, which is somewhat different from the one in the House plan, would cost about $285 billion. If you combine these two items alone, you get to $1.62 trillion--which is already over the $1.5 trillion limit.