Reilly Neill holds a commanding lead in the Democratic primary for Montana’s open U.S. Senate seat due to her dominant early fundraising—over $100,000 cash on hand compared with under $20,000 for the next closest candidate—and her sustained grassroots campaign of county-by-county roundtables focused on healthcare costs and housing. The June 2 primary features five candidates, yet Neill’s prior statewide runs and consistent visibility have produced broad trader consensus that she will secure the nomination. Recent independent spending on mailers and digital ads supporting Alani Bankhead has lifted the Air Force veteran slightly in the final weeks, but the outlay has not narrowed the gap enough to threaten the frontrunner. The remaining candidates trail with minimal resources and limited name recognition.