A federal judge in Boston has permanently blocked the Trump administration from implementing a proof-of-citizenship requirement for voters, effectively converting a preliminary injunction issued a year ago into a final ruling. U.S. District Court Judge Denise Casper’s decision halts a key component of the White House’s broader effort to overhaul election procedures, dealing a significant legal setback to the administration’s policy agenda.

The ruling invalidates the data verification system designed to enforce the citizenship check, reinforcing judicial skepticism toward the administration’s election integrity initiatives.

This decision follows a pattern of legal challenges that have repeatedly stalled the White House’s attempts to reshape voting regulations, with courts consistently finding the proposed measures unlawful or lacking sufficient legal basis.

Markets are monitoring the development as part of a broader assessment of political risk and regulatory stability.

The ruling adds to a growing list of judicial rejections of the administration’s policies, including a recent dismissal of a Department of Justice lawsuit seeking access to detailed voter data from Maryland.

These legal defeats underscore the challenges the White House faces in implementing its domestic policy agenda through executive action.