Each U.S. Senator serves 6-year Terms. There are No Term Limits. As long as they choose to serve and are re-elected every sixth year, They can continue to serve.
6 years.~Daft Punk Rocks
A US Senator must have been a citizen of the US as a natural-born citizen in order to become eligible for that office. In other words, people who are not born in the US cannot become senator.
4 years!
He has held that office since 16 May 1990.
US Senator
US Representatives stay in office for two years, but can be re-elected indefinitely. US Congresspeople stay in office for six years, and also can be re-elected indefinitely. US Presidents stay in office for four years, can be re-elected once but can serve a total of ten years in the office.
There is no limit to the number of terms a senator can serve.
6 years
Senator Daffy Duck US Office Building Washington, DC
Congressmen and Senators in the US have no term limits.
For as many terms as they were elected.
State Senator, Illinois General Assembly; US Senator from Illinois