An Illinois judge has disqualified Trump from the ballot.

A judge in Illinois has ruled to bar former President Donald Trump from participating in the state's Republican presidential primary ballot due to his involvement in the January 6, 2021, Capitol attack.

Cook County Circuit Judge Tracie Porter issued the ruling on Wednesday, siding with Illinois voters who contended that Trump violated the anti-insurrection clause of the US Constitution's 14th Amendment. The decision, however, is pending appeal by Trump, with Judge Porter delaying its implementation.

The outcome of this case, along with similar challenges, may ultimately rest with the US Supreme Court, which heard arguments regarding Trump's ballot eligibility on February 8.

Despite the delay, Free Speech For People, a leading advocacy group involved in the disqualification effort, hailed the ruling as a "historic victory."

In response, a spokesperson for Trump's campaign, currently the frontrunner for the 2024 Republican nomination, denounced the ruling as unconstitutional and vowed a swift appeal.

Earlier, Colorado and Maine also removed Trump from their state ballots under Section 3 of the 14th Amendment, which prohibits individuals who have engaged in insurrection or rebellion against the US from holding public office. These decisions are pending appeal as well.

Section 3 was invoked due to Trump's supporters' actions on January 6, 2021, when they stormed the Capitol in an attempt to overturn the results of the 2020 presidential election. During the incident, Trump delivered an inflammatory speech encouraging his supporters to "fight like hell" before failing to intervene as the chaos unfolded.

The Supreme Court is currently reviewing Trump's challenge to his disqualification in Colorado, with justices expressing skepticism during oral arguments about states' broad authority to impact national elections.