Anti-Trump protesters sang the national anthem and chanted "No hate in our state" outside of 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 rally in Montana on Thursday.

A local NBC affiliate reports that about 200 people gathered outside the rally in Great Falls. Video posted online shows the protestors singing "The Star-Spangled Banner" as people walking to the rally walk by.

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The protests occurred as Trump visited Montana to take part in a campaign-style rally where he took aim at 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-Mont.) and accused him of failing to live up to his promises in Washington.

Trump also voiced his support for State Auditor Matt Rosendale, who is challenging Tester in November.

"A vote for Jon Tester is a vote for [Senate Minority Leader] Chuck Schumer [D-N.Y.], [House Minority Leader] Nancy Pelosi Nancy PelosiHoyer: House should vote on COVID-19 aid — with or without a bipartisan deal Ruth Bader Ginsburg lies in repose at Supreme Court McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE [D-Calif.] and the new leader of the Democrat Party, Maxine Waters Maxine Moore WatersPowell, Mnuchin stress limits of current emergency lending programs Pelosi: House will stay in session until agreement is reached on coronavirus relief Omar invokes father's death from coronavirus in reaction to Woodward book MORE [D-Calif.]," Trump said, repeating his claim that Waters, an outspoken Trump critic who has called for his impeachment, has surfaced as the Democrats's most prominent member. "Where have they gone?"

The NBC affiliate noted that many of the protesters were supporters of Tester, who is expected to face a competitive battle while trying to retain his seat. He's considered a prime target for Republicans trying to expand their slim majority in the upper chamber.

A poll in mid-June found that Tester was leading Rosendale, 51 percent to 44 percent.