In the us government citizens play a key role in

Elections

Explanation:

The United States is a representative democracy, which means that the citizens of the country have the right to participate in politics by electing representatives. Therefore, the most important and significant role that citizens play in American politics is that of participating in elections. Citizens play a key role in elections because this is the moment when they are able to deeply influence politics by choosing representatives that closely align with their beliefs and interests.

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

what are two things that greatly the american economy after the war? the huge buildup of u.s. military the beginning of the korean conflict the creation of the gi bill the marshall plan for nations