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.

Majority Leader John Thune (R-South Dakota) conceded early Tuesday that he did not know if he had the votes yet to pass the measure.