Senate Majority Leader John Thune (R-SD) is preparing to escalate a high-stakes parliamentary showdown in Washington by invoking the “nuclear option” to push through a backlog of President Donald Trump’s nominees. The move comes amid what Republicans describe as unprecedented Democratic obstruction, leaving dozens of lower-level administration posts unfilled and straining the White House’s ability to govern effectively.

At issue is whether the Senate should continue to require 60 votes to advance even the most routine presidential appointments. Thune is setting the stage to lower that threshold for certain nominees to a simple majority, fundamentally altering how the chamber conducts its business. While the maneuver would not affect cabinet secretaries or federal judges, it would apply to subcabinet positions and other administrative roles critical to carrying out Trump’s agenda.

On Tuesday evening, Thune introduced a resolution grouping about 40 nominees together for expedited consideration. Under current rules, the Senate must first vote to invoke cloture — a procedural step that requires 60 votes to overcome a filibuster. Democrats are expected to block cloture, leaving the resolution short of the necessary supermajority. But this anticipated defeat is central to Thune’s strategy.

By voting on the prevailing side, Thune preserves the right to request reconsideration of the failed cloture motion. Once debate is cut off, Democrats lose the ability to further delay proceedings. At that point, Thune plans to raise a point of order that cloture on such resolutions should only require a simple majority.

The presiding officer — either Senate President Pro Tempore Chuck Grassley (R-IA) or Vice President J.D. Vance, acting in his constitutional role — is expected to rule against Thune, upholding existing precedent. But Thune will then appeal the ruling to the full Senate. If 51 senators support overturning the chair, a new precedent would be established: cloture for grouped lower-level nominees would henceforth require only a simple majority.

If the gambit works, Thune could schedule another cloture vote under the new standard as early as Monday, September 15. A final vote approving the batch of nominees might then follow by Wednesday, September 17. For the Trump administration, this would represent a major breakthrough in staffing agencies that have been hobbled by delays.

Supporters of the plan argue that the nuclear option is necessary to ensure government can function. They point out that many of these nominees are non-controversial career professionals whose appointments have historically been routine. Without reform, they say, partisan obstruction risks paralyzing basic operations of the executive branch.

Critics, however, warn of long-term damage. Every time the Senate deploys the nuclear option, they argue, it chips away at the chamber’s tradition of extended debate and consensus-building. That tradition has long allowed the minority party to wield significant influence, forcing negotiation and compromise. Weakening those protections, opponents caution, risks turning the Senate into a smaller version of the House — dominated by simple majorities and prone to wild policy swings.

The looming fight is the latest chapter in a decade-long story of escalating procedural warfare. In 2013, then-Majority Leader Harry Reid (D-NV) led Democrats in using the nuclear option to eliminate the 60-vote threshold for executive branch nominees and lower-court judges. Four years later, Mitch McConnell (R-KY) extended the tactic to Supreme Court nominations, enabling the confirmation of Justice Neil Gorsuch and subsequent Trump appointees.

For Republicans, Thune’s move represents continuity with those earlier steps, a pragmatic adjustment to a more polarized era. For Democrats, it represents a dangerous precedent that could one day be turned against Republicans themselves when the balance of power shifts.

As both sides brace for a climactic vote later this week, one thing is clear: the Senate’s rules, once seen as sacrosanct, are increasingly subject to change whenever they stand in the way of majority will. Whether Thune succeeds in adding his name to the list of leaders who rewrote Senate tradition will be decided in the coming days — but the consequences of that decision are likely to reverberate for years.