Rob Quist is a country & bluegrass musician from Montana. He is a Music and Cultural Ambassador for the state and is running for a seat in the House in a 2017 special election. He’s also a supporter of Bernie Sanders, so its wonderful that Bernie took the time to go to Montana in support of Quist’s campaign. Here’s a video of the speech Bernie gave on May 20th:
Wikipedia has a summary of his political inspiration and positions. In general, his platform is very similar to Sanders’. I would label him a Progressive. He has no PAC and according to the speech from Bernie, the majority of donations to his campaign have come from individuals and average out to $25 – reminiscent of Sanders’ own $27 average donation.