Robert Carlson Kelleher Sr. (March 30, 1923 – May 29, 2011), was an American attorney and perennial candidate.

He ran for governor of Montana on five occasions, losing the Democratic primaries in 1980, 1984, 1992, and 1996; while running on the Green Party ticket in 2004.

He was a candidate for president of the United States in 1976,[1] where he made the ballot in the Democratic primaries in New Hampshire, Massachusetts and Georgia.

[2] In June 2008, he won a surprise victory in a five-way primary election for the Republican nomination against incumbent U.S.

[3] Kelleher took many positions that were highly unorthodox by Republican Party standards, such as favoring more liberal drug control policies, supporting universal healthcare and affirmative action, and favoring fair trade restrictions.