What is the american system? Define it in easy terms to help me remember

The main reason the us senate rejected the treaty of versailles was because, isolationists felt the us should not have gotten into the war. republicans had gained power in the senate. democrats had gained power in the senate. european nations wanted to punish germany.

This table shows the number of cities in north carolina from 1860 to 1910. which factor was responsible for the change in population from 1860 to 1910?

Bolsheviks promised to end the war, redistribute land to all the peasants , and transfer factories to the committees