The primary purposes of such imposts was not to raise revenue, but to allow American manufacturing to develop by giving it a price advantage in the domestic market over foreign competitors. McKinley biographer Margaret Leech noted that Canton had become prosperous as a center for the manufacture of farm equipment because of protection, and that this may have helped form his political views. McKinley introduced and supported bills that raised protective tariffs, and opposed those that lowered them or imposed tariffs simply to raise revenue.[57] Garfield's election as president in 1880 created a vacancy on the House Ways and Means Committee; McKinley was selected to fill it, gaining a spot on the most powerful committee after only two terms.[58]
McKinley increasingly became a significant figure in national politics. In 1880, he served a brief term as Ohio's representative on the Republican National Committee. In 1884, he was elected a delegate to that year's Republican convention, where he served as chair of the Committee on Resolutions and won plaudits for his handling of the convention when called upon to preside. 