President Donald Trump is once again turning up the pressure on Senate Republicans, this time directing his frustration squarely at Senate Majority Leader John Thune over a figure most Americans have never heard of but who wields enormous influence behind the scenes: Senate Parliamentarian Elizabeth MacDonough.
In a fiery Truth Social post Monday, Trump demanded that Thune remove MacDonough immediately, accusing her of repeatedly standing in the way of Republican priorities and favoring Democrats in key procedural rulings.
“Senate Majority Leader John Thune should immediately fire the Parliamentarian, who treats Republicans, and everything that they stand for, horribly!” Trump wrote. He went on to describe MacDonough as a “nasty holdover from Mitch McConnell” and a “Radical Left Lunatic that caters to Democrats.”
The president's latest outburst appears tied to a recent ruling involving a proposed $1 billion allocation connected to security enhancements for the White House ballroom construction project. MacDonough reportedly determined the provision failed to meet Senate reconciliation rules, effectively blocking Republicans from advancing it through the streamlined budget process.
— Rapid Response 47 (@RapidResponse47) June 8, 2026
While the ruling itself may seem technical, the larger battle is anything but. Trump and many conservatives view MacDonough as one of the biggest obstacles standing between Republicans and the passage of major pieces of the president's agenda.
This is not the first time Trump has publicly questioned why MacDonough remains in her position. Earlier this year, he blasted Senate Republicans for keeping the parliamentarian in place, pointing to her original appointment during the Harry Reid era and arguing that she has consistently ruled against Republican priorities.
At the time, Thune appeared reluctant to engage in the fight.
“I didn’t read it, so I need to look at it,” Thune said when asked about Trump's criticism. He also warned that removing the parliamentarian could create additional challenges for Senate Republicans, particularly when trying to assemble enough votes to pass legislation.
That caution highlights the unusual position MacDonough occupies. The Senate parliamentarian is not an elected official and does not vote on legislation. Instead, the office serves as the chamber's chief procedural referee, advising senators on Senate rules, legislative procedures, committee referrals, and reconciliation requirements.
Those procedural rulings carry enormous consequences.
For Republicans, the issue is especially important because budget reconciliation remains the only realistic way to bypass a Democratic filibuster and pass major legislation with a simple majority. If MacDonough determines that a provision does not qualify under reconciliation rules, it can be stripped from the bill entirely, forcing supporters to pursue the much more difficult 60-vote route.
That concern is particularly relevant to Trump's push for the SAVE America Act. The president has made clear he wants the legislation enacted before the upcoming midterm elections. Supporters argue reconciliation may be the only viable path forward. Critics of MacDonough's rulings believe she could effectively block the bill simply by determining that its provisions fall outside the scope of budget-related legislation.
For Trump, that possibility appears unacceptable. His latest comments signal that he sees the parliamentarian not as a neutral referee but as a political roadblock preventing Republicans from fully implementing their agenda.
Whether Thune shares that view remains an open question. The South Dakota Republican has so far shown little interest in removing MacDonough, and many Senate Republicans remain wary of overturning longstanding institutional norms for short-term political gain.