Robert "Bob" Kelleher (March 30, 1923 – May 29, 2011), was an American attorney and perennial candidate. Starting in 1964, Kelleher ran for public office 16 times, at various times for the Democratic, Green and Republican parties. He ran for governor of Montana on five different occasions, losing the Democratic primaries in 1980, 1984, 1992, and 1996; while running on the Green Party ticket in 2004. He was the Democratic Party nominee for the U.S. House of Representatives in Montana's 2nd congressional district in 1968, and the Republican Party nominee for the United States Senate in 2008.