Question: The 2008 Montana gubernatorial election was held on which date, to elect the governor and lieutenant governor of the U.S. state of Montana, the Republican nominee was Roy Brown, Brown's running mate was businessman, and future U.S. Representative and U.S. Senator Steven David Daines, is an American businessman, entrepreneur, and the junior United States Senator from Montana?
Sentence (from "Montana gubernatorial election, 1996"): Incumbent Governor of Montana Marc Racicot, who was first elected in 1992, ran for re-election.
Relevant evidence: No