The open-seat contest in Montana’s 1st District remains tightly contested because recent polling averages show Democrat Sam Forstag and Republican Aaron Flint within a few points of each other, prompting forecasters to shift ratings into toss-up or lean-Republican territory. Forstag’s profile as a smokejumper and union leader has strengthened appeal among independents in western counties, while Flint’s Trump endorsement and radio background consolidate Republican support in a district that leaned Republican by roughly five to eleven points in recent cycles. High outside spending, a late presidential rally, and competing turnout efforts keep the final margin uncertain, with traders pricing even odds across narrow victory buckets and reflecting sensitivity to last-minute shifts in participation or late-cycle messaging.