A Montana judge has ordered state elections officials to remove the Green Party from the November ballot, a boost to Sen. Jon Tester Jonathan (Jon) TesterDemocrats shoot down talk of expanding Supreme Court Pence seeks to boost Daines in critical Montana Senate race This World Suicide Prevention Day, let's recommit to protecting the lives of our veterans MORE (D) in his bid for reelection.

Helena District Court Judge James Reynolds invalidated some of the signatures Green Party backers submitted to the secretary of state’s office, either because the signatures did not match those on file, because they did not match a registered voter or because of improper signature-gathering practices.

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As a result, the Green Party did not meet statewide requirements that they submit a total of 5,000 valid signatures gathered across at least 34 of Montana’s 100 state House districts.

The state Democratic Party had sued to block the Green Party’s access to the ballot, claiming Republicans had improperly manipulated the signature-gathering process.

Earlier this year, state Democrats raised concerns after ostensible Green Party supporters turned in more than 7,000 signatures on the final day of qualifying. At least two of those signature-gatherers identified themselves in social media postings as employees of Advanced Micro Targeting, a Republican political consulting firm in Nevada.

The decision means artist and gallery owner Steve Kelly will not appear on November’s ballot against Tester and state Auditor Matt Rosendale (R). That could be a needed assist for Tester, one of the most vulnerable Senate Democrats seeking reelection this year, who might have feared losing some liberal voters to Kelly.

In a statement, a Green Party spokeswoman blamed the state Democratic Party, in what she called a violation of voters’ rights.

“The Montana Democratic Party’s deep pocketed effort to suppress the vote in Montana has, for the moment, succeeded,” said Danielle Breck. “The [Montana Green Party], however, understands that it is not only our right, but also our duty, as citizens to do everything we can to stand up against such efforts.”

Nancy Keenan, who runs the Montana Democratic Party, celebrated the ruling as a win “against the tactics of out-of-state Republican dark money groups that are blatantly trying to interfere in Montana’s democracy.”

Montana politics are littered with examples of the two major parties flirting with smaller parties in service to their own causes. In 2012, Tester allies went so far as to spend money to bolster the Libertarian candidate.

That year, a super PAC funded by labor and environmental groups backing Tester spent $500,000 on a television ad campaign calling the Libertarian candidate, Dan Cox, “the real conservative.” Cox took almost 32,000 votes that year, while Tester beat then-Rep. Denny Rehberg (R) by a margin of just 18,000 votes.

Montanans are more used to seeing Libertarian candidates on the ballot than they are the Green Party. The state Green Party has only qualified a candidate for two major statewide races in the last two decades; the same candidate challenged then-Sen. Max Baucus Max Sieben BaucusBottom line Bottom line The Hill's Morning Report - Presented by Facebook - George Floyd's death sparks protests, National Guard activation MORE (D) in 2002, and then-Gov. Brian Schweitzer (D) in 2004.

A Libertarian candidate, Rick Breckenridge, remains on the ballot against Tester and Rosendale this year. Breckenridge ran for Congress in 2016, claiming 3.2 percent of the vote against then-Rep. Ryan Zinke Ryan Keith ZinkeTrump extends Florida offshore drilling pause, expands it to Georgia, South Carolina Conspicuous by their absence from the Republican Convention Trump flails as audience dwindles and ratings plummet MORE (R), who is now President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE’s Interior Secretary.

Among Democrats seeking reelection in states Trump won, the president has particularly singled out Tester for attack, slamming him repeatedly since the Veterans' Affairs Committee member help sink the nomination of Trump's former pick to lead the VA.

"Jon Tester showed his true colors with his shameful, dishonest attacks on a great man, a friend of mine, a man that I said, 'Why don't you run the VA, you'll be great.' Navy Adm. Ronny Jackson," Trump said at a campaign rally in Montana on Thursday, where he expressed support for Rosendale.