The open-seat race for Montana's 1st Congressional District will be between Democratic candidate Monica Tranel and Republican candidate Ryan Zinke, who was previously a congressman from the Big Sky Country and interior secretary in the Trump administration.
Zinke narrowly won the nomination in Tuesday's voting over Al Olszewski, a former state senator and orthopedic surgeon. Olszewski claimed to be the most conservative candidate on the ballot and hit out at his rival over ethics allegations. Zinke will now face Tranel in November in Montana's newly-created 1st Congressional District, covering the western quarter or so of the state. Montana gained a second House seat for the first time in four decades, due to strong population growth in the decade leading up to the 2020 census.