tariffs were the largest source of federal revenue from the 1790s to the eve of World War I, until it was surpassed by income taxes. source:https://en.wikipedi

tariffs were the largest source of federal revenue from the 1790s to the eve of World War I, until it was surpassed by income taxes. source:https://en.wikipedia.org/wiki/Taxation_history_of_the_United_States#Income_for_federal_government https://en.wikipedia.org/wiki/Taxation_history_of_the_United...