Progressive era reformers tried to reduce the gap in wealth between the rich and the poor by

implementing a graduated income tax

Explanation:

A progressive tax or graduated income tax is a tax policy in which the tax rate increases progressively from low to high incomes, meaning that people with higher income gets taxed more, in the US the first progressive income tax was established by the Revenue Act of 1862 by President Abraham Lincoln

- "a new era of american politics began with jackson's election in 1828, but it also completed a grand social experiment begun by the american revolution. nevertheless, jacksonian democracy represented a provocative blending of the best and worst qualities of american society."

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