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 TrumpNFL freezes policy barring players from protesting during anthem McConnell spokesman on Putin visit: 'There is no invitation from Congress' Petition urges University of Virginia not to hire Marc Short 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.

The protests occurred as Trump visited Montana to take part in a campaign-style rally where he took aim at Sen. Jon TesterJonathan (Jon) TesterOvernight Defense: Trump inviting Putin to DC | Senate to vote Monday on VA pick | Graham open to US-Russia military coordination in Syria Senate to vote Monday on Trump's VA nominee On The Money: Trump rips Fed over rate hikes | Dems fume as consumer agency pick refuses to discuss border policy | Senate panel clears Trump IRS nominee 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 PelosiDems unveil slate of measures to ratchet up pressure on Russia GOP looks to blunt Dems’ attacks on rising premiums Who will be the ‘bridge’ for the Democrats? MORE [D-Calif.] and the new leader of the Democrat Party, Maxine WatersMaxine Moore WatersMaxine Waters defenders gather to counter far-right protest that doesn’t happen: report Dems unveil slate of measures to ratchet up pressure on Russia Maxine Waters warns supporters not to counterprotest armed rallies against her 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.