Vance can overrule the Parliamentarian. However, the answer to the question as phrased is no. 
The Claim
It is indeed within the authority of Vance to overrule the parliamentarian.
The presiding officer (the Vice President in the Senate or Speaker of the House for House matters) can overrule a parliamentarian.
The parliamentarian only provides expert advice, and their rulings are not legally binding.
The actual Senate math says Vance would be a fool to try.
The Role of the Parliamentarian
The Bipartisan Policy Organization addresses the question, What Is the Role of the Senate Parliamentarian?
The parliamentarian and their staff provide nonpartisan advice to the presiding officer, chamber and committee leaders, individual senators, and staff about Senate rules, precedents, and statutes as they pertain to Senate proceedings.
The current parliamentarian, Elizabeth MacDonough, has served since 2012 under the leadership of both parties, underscoring the nonpartisan nature of the position.
Why Does the Senate Have a Parliamentarian?
The parliamentarian’s most important role is to provide procedural advice to the presiding officer during floor proceedings. The presiding officer facilitates day-to-day proceedings by recognizing members to speak, maintaining order and decorum, and ruling on points of order or the appropriateness of amendments, measures, or motions. The Vice President, as President of the Senate, is the presiding officer of the Senate, but in his or her absence these duties fall to the president pro tempore of the Senate or another senator designated to stand in for him or her.
The procedural rules of the road maintained by following the parliamentarian’s advice help to structure senators’ negotiations with one another. Without this consistency, how the chamber conducts its day-to-day business would vary wildly, causing confusion and likely delaying or halting business. This is why virtually all legislative bodies around the world have a parliamentarian or other similar position.
Beyond guiding floor procedure, the parliamentarian also acts on behalf of the majority leader to manage the process of referring bills to committee in a way that maintains carefully defined committee jurisdictions. The parliamentarian’s office is also responsible for maintaining the record of precedents of the Senate.
Can the Senate Ignore the Parliamentarian’s Advice?
Yes. The presiding officer can choose to ignore the advice of the parliamentarian on any matter they choose, which has happened several times before.
The parliamentarian exists to advise the chamber on existing procedures, but it is the presiding officer’s duty to make rulings. However, any senator may raise a point of order challenging the ruling of the presiding officer for not following the correct procedure. The dispute would then be put to a vote of the chamber. Ultimately, senators themselves are responsible for deciding the outcome of all parliamentary questions, even if they go against standing rules and precedent.
Overruling the Parliamentarian
Yes, it is within Vance’s power. It’s rare, but it has been done before.
- Vice President Nelson Rockefeller overruled the Parliamentarian in 1975 regarding procedures for voting to change the Senate’s filibuster rules.
- Vice President Hubert H. Humphrey ruled contrary to the Parliamentarian’s determination regarding the filibuster threshold in 1967 and 1969.
- In March 2021, 24 Democratic members of Congress wrote a letter to President Joe Biden (D) and Vice President Kamala Harris (D) requesting that Harris overrule the Senate Parliamentarian’s determination that a provision raising the national minimum wage to $15 per hour proposed for the 2021 reconciliation bill was extraneous and had to be removed according to the Byrd Rule. Ultimately, Harris ruled in accordance with the Parliamentarian and removed the provision.
Fancy that.
Vice President Kamala Harris overruled her party and stuck with Parliamentary rules.
Had she unwisely overruled the Parliamentarian, the SAVE Act (and Lord only knows what else) might be law today.
What If Vance Tried?
Vance would fail.
If that were not so, this move would already be a fait accompli.
Four Senators Against the Save Act
- Susan Collins, R-Maine
- Lisa Murkowski, R-Alaska
- Mitch McConnell, R-Ky
- Thom Tills, R-NC
- All the Democrats
On a SAVE Act Basis, Republicans would be at least a vote short. It’s possible outed Republican Senator John Cornyn of Texas would also vote no.
But the big problem for the nuclear maneuver is the number of Senators against killing the filibuster.
Senators Against Killing the Filibuster
- Senate Majority Leader John Thune (R-SD)
- Kevin Cramer (R-ND)
- James Lankford (R-OK)
- Jerry Moran (R-KS)
- Roger Marshall (R-KS)
- Thom Tillis (R-NC)
- Sue Collins (R-ME)
- Lisa Murkowski (R-AK)
- Mitch McConnell (R-KY)
That’s nine with Senator John Cornyn (R-TX) recently wavering.
I strongly suspect Cornyn wavered to get Trump’s support for a Republican Senate primary.
But Trump booted Cornyn so Cornyn is free to go back to his long-held belief in not killing the filibuster.
As an amusing side result of Trump forcing out Cornyn, Texas is now in play for Democrats.
Vance Would Be Humiliated
Vance and Trump would be humiliated if Vance tried overruling the parliamentarian.
Assuming Cornyn would vote as I now expect, a vote to overturn the filibuster would die 57-43. If not, 56-44 against.
Senate Majority John Thune has repeatedly warned he is not close to having sufficient votes.
If it was a matter of one or two votes, there may have been a foolish attempt with huge arm twisting. But as the vote stands, it would be political suicide.
One has to wonder about the thought process of Scott Presler with 2.4 million followers rooting for Vance to be humiliated in a politically nonsensical maneuver.
Armchair Political Stupidity
These attacks by Presler and other armchair pundits on Majority Leader Thune do nothing but further splinter the Republican party.
But Vance isn’t that stupid.
Presler and many others are also want the Senate to remove Thune as majority leader.
That act of stupidity would fail by an even bigger margin. Thune is well-respected.
Let the Implosion Continue
The midterm election is Tuesday, November 3, 2026.
That’s 115 days away, with the Iran ceasefire off, year-over-year inflation raging, home affordability collapsing, and nonsensical tariff policies in place.
Independent’s and Hispanic’s support for Trump has collapsed.
But hey, let the political bickering and Republican implosion continue.
Go ahead and have the vote that Presler wants. It would be more than a bit amusing.
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Not sure what little lord fauntleroy is capable while serving as the chief boot licker for taco.