From his first term in Congress, McKinley was a strong advocate of protective tariffs. 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. Garfield's election as president in 1880 created a vacancy on the House Ways and Means Committee; McKinley was selected to fill it, placing him on the most powerful committee after only two terms.