The power of political machines declined during which period?

The correct answer is the progressive era.

Progressive era is the period when the power of political machines was declined.

There was political reforms and social activism in United states during this period. The main purpose for progressive movement was to eliminate problems which were being caused by immigration, urbanization, political corruption and industrialization.

This movement their aim was to target the bosses and the political machines.

The activists reformed public education, insurance, medicine, industry and finance.

whose power in the senate is equal to the power of the speaker of the house?

(e) a major consequence of the election was that several southern states