Republicans have spent the past few weeks casting the bill as one that would equalize working conditions for government workers and those in the private sector. Today, government workers can forgo overtime pay and take more time off, but private sector workers cannot.

Democrats are expected to argue that the GOP bill is an assault on the 40-day workweek that would undermine the right to overtime pay. But Republicans have pointed out that trading overtime work for time off could only be done under an agreement between employers and employees.

The Senate starts work at 10 a.m. and at around noon, it will vote on the nomination of David Medine to be the chairman of the Privacy and Civil Liberties Oversight Board.

Senators will break after that vote for their normal caucus lunches. When they return at 2:15 p.m., they are expected to immediately agree on a motion to proceed to the Water Resources Development Act, S. 601.

That bill authorizes various water-related projects and is expected to take up a good part of the week for the Senate.