Anti-Trump protesters sing national anthem outside rally

Anti-Trump protesters sang the national anthem and chanted "No hate in our state" outside of President TrumpDonald John TrumpHannity urges Trump not to fire 'anybody' after Rosenstein report Ben Carson appears to tie allegation against Kavanaugh to socialist plot Five takeaways from Cruz, O'Rourke's fiery first debate 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 TesterJonathan (Jon) TesterMontana lawmakers cheer recommendation to ban mining north of Yellowstone Cook Political Report moves Texas Senate race to ‘toss-up’ Trump Jr. campaign event looks for new venue after Montana restaurant declines to host 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 PelosiNancy Patricia D'Alesandro PelosiSinema, Fitzpatrick call for long-term extension of Violence Against Women Act Internal RNC poll shows Pelosi is more popular than Trump: report Indicted lawmaker angers GOP with decision to run for reelection MORE [D-Calif.] and the new leader of the Democrat Party, Maxine WatersMaxine Moore WatersTrump boosts Heller, hammers 'Wacky Jacky' opponent in Nevada On The Money: Midterms to shake up House finance panel | Chamber chief says US not in trade war | Mulvaney moving CFPB unit out of DC | Conservatives frustrated over big spending bills The Hill's Morning Report — Sponsored by United Against Nuclear Iran — The Hill interviews President Trump 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.