Reilly Neill holds the commanding position in the June 2 Democratic primary for Montana’s open U.S. Senate seat, backed by far stronger fundraising and cash reserves than her rivals along with her prior service as a state representative and endorsement from former Governor Brian Schweitzer. Recent independent expenditures from a Republican-aligned PAC targeting Neill with critical mailers have coincided with her further consolidation of support, as traders interpret the attacks as potentially galvanizing Democratic voters behind the best-funded candidate. The remaining contenders trail with minimal resources and visibility, leaving little room for late shifts before ballots are cast.