In 2006 Sestak defeated incumbent Curt Weldon, who was being investigated for misuse of campaign funds, by 56% to 44%.

She defeated incumbent Michael Diven, a political rival of her father who had switched to the Republican Party earlier that year.

He defeated incumbent John Hughes, who had served since 1905, when Coleman's father-in-law vacated the post.

He defeated incumbent Michael Stack, who largely opposed the New Deal, in the Democratic primary.

He defeated incumbent Guy Sattley, who had served five mostly non-consecutive terms on the body starting in 1990.

He defeated incumbent Robert Bischoff, who had held the position for over 30 years, by a 54 to 46 percent margin.

Sorlie defeated incumbent Ragnvald A. Nestos in the 1924 gubernatorial race.

He defeated incumbent Arthur A. Link in the 1980 race for governor and served one term.

Walberg defeated incumbent Republican Joe Schwartz, a former State Representative and gubernatorial candidate, during the 2006 primary election.

At the general election in 1926 in the riding of Claresholm he defeated incumbent Thomas Milner, Independent.