All told, the Senate bill includes $4.5 trillion in tax cuts, according to the latest CBO analysis, making permanent Trump’s 2017 rates, which would expire at the end of the year if Congress fails to act, while adding the new ones he campaigned on, including no taxes on tips.

Trump is still saying Social Security benefits won’t be taxed. The reality is that the tax break under discussion is a temporary bonus senior tax deduction whose size depends on which version of the bill makes it into law. The latest version in the Senate includes a $6,000 per person deduction, compared with the House-passed $4,000 deduction.

After a late shift by Senator Lisa Murkowski to yes, the legislation now returns to the House, where its passage remains far from certain.