1. Lawmakers are back at work on Capitol Hill, and Republicans are charging ahead with their push to get a $1.5 trillion tax cut bill on the president’s desk by Christmas.

The full Senate could vote on the bill this week. Republican leaders are scrambling to corral votes, but at least six G.O.P. senators have not committed to it, citing concerns over the deficit and the effect on health care. They include Jeff Flake, Bob Corker and Ron Johnson, above from left. Here’s the full list.