For years conservatives have complained about the Clintons’ dirty campaign tricks.

Now it looks like even liberals are getting sick of them.

Supporters of Democratic presidential hopeful Bernie Sanders have filed a lawsuit against former President Bill Clinton in Massachusetts court, claiming he broke the law to help deliver the state to his wife earlier this month.

According to the lawsuit filed by a group called MA Sanders Voters and Volunteers Disenfranchised by Bill Clinton, the former president engaged in a number of illegal activities, including openly campaigning at polling stations.

Critics had previously complained that Clinton’s actions and appearances at polling stations (especially in areas that favored Sanders) created long delays and kept many voters from casting their ballots. And that may have made a real difference in a state election that Hillary Clinton only won by one percentage point.

“With 100,00 undecided voters and a margin of victory of only 16,800 votes, it is eminently plausible that Bill Clinton impacted the final result,” the lawsuit claims.

The suit was filed Wednesday in the Boston Federal District Court, and asks the judge to invalidate the state primary results and hand all of the delegates to Sanders.

If that happens, it could significantly tip the balance of the 2016 race.

The lawsuit follows a petition calling for the arrest of Bill Clinton that has gotten more than 120,000 signatures.

While Bill Clinton and the Clinton campaign are likely to fight the suit, it may prove a challenge. A draft of the suit appears to contain photos showing the former president doing much of what is alleged.

A copy of the complaint was posted online, and can be viewed here.