For how many years does a u. s. senator’s term of office last before his/her seat undergoes another election?

2 years

Explanation:

The requirement for senator's reelection is regulated under the  Article I, section 3 of the untied states constitution. The senates seat can be filled for the maximum of 6 years, but the senate have to undergoes re-election every 2 years. But, for each election , only one-third of the senates are eligible for the race in order to maintain the stability of the senate office.

well, i can't read it so i'll ask you questions about it : )

if you were a reader and you read the introduction, would you want to read more?

does it start with a question? if so, is it something you would want to read about?

and ask any friends or family for their opinion : )

answer; face validity;