The shutdown, now approaching its second month, began after negotiations over domestic spending levels stalled. The White House and congressional Democrats remain at odds over border security outlays and discretionary spending caps.
How the filibuster works
The filibuster is a Senate tradition that permits any senator to extend debate indefinitely, effectively blocking a vote on most legislation. Under current rules, ending debate—known as invoking cloture—requires three-fifths of the chamber, or 60 votes. Once cloture is reached, a bill can pass with a simple majority.
The practice traces back to the early 19th century. Modern cloture was established in 1917 when Rule 22 created a formal mechanism to limit debate. While the procedure empowers the minority to demand concessions, it has frustrated Senate majorities across party lines for decades. A concise explanation of the rule is available on the official Senate website.
Precedents for the “nuclear option”
Both parties have narrowed filibuster protections in recent years. In 2013, Democrats under President Barack Obama lowered the cloture threshold for most executive and judicial nominees to a simple majority. Four years later, Republican leadership extended that change to Supreme Court nominations during Trump’s first term. These steps, widely labeled the nuclear option, left legislative filibusters intact.
Trump has previously sought to eliminate the rule entirely, but key Republicans resisted, arguing that the filibuster preserves Senate consensus-building and shields the party when it is out of power. During his first term, several attempts to alter the rule stalled amid internal opposition.
Former President Joe Biden, while still in office, endorsed targeted adjustments to the filibuster to advance voting-rights and abortion-rights bills but stopped short of advocating a full repeal.

Imagem: Internet
Current Republican response
Senate Majority Leader John Thune has expressed caution about terminating the filibuster. Earlier in the shutdown he said it should be avoided “at all costs,” citing concerns that any short-term advantage could backfire when control of the chamber flips. Following Trump’s latest demand, a spokesperson for Thune said the leader’s view on the “importance of the legislative filibuster is unchanged.”
Several rank-and-file Republicans share those reservations, noting that a future Democratic majority could enact sweeping policy changes if the procedural barrier disappears. No GOP whip count has been released, but public statements suggest the votes to invoke the nuclear option are not currently available.
Impact on federal programs
The stalemate carries palpable consequences. Funding for SNAP, which serves roughly 40 million people, is set to lapse this weekend, endangering grocery assistance for low-income households. At the same time, the Affordable Care Act’s open-enrollment window opens with insurers authorized to increase premiums to compensate for the absence of cost-sharing reductions. Agency contingency plans warn of service interruptions at national parks, delays in tax-refund processing and postponed federal contract payments.
While House Democrats have passed multiple short-term funding measures, Senate Republicans have declined to bring them to the floor, insisting that any bill must reflect White House priorities. Without a bipartisan breakthrough or a rules change, the shutdown is positioned to surpass the 35-day closure that stretched from December 2018 to January 2019.
Trump’s renewed push to dismantle the filibuster underscores the political pressure created by the protracted funding gap. However, unless GOP resistance softens, the centuries-old Senate rule remains intact, and the legislative impasse is expected to continue into November.
Crédito da imagem: Aaron Schwartz/EPA/Shutterstock