How many clases of senators are there in us?

Answer 1

U.S. Senate seats are divided among three classes. The classes have nothing to do with rank; they determine only the beginning and end dates for the three overlapping U.S. Senate terms. At the time statehood is granted, the two Senate seats to which each state is entitled are added to two of the classes. Class 1 Senate seats come up for election every six years including 2012. Class 2 Senate seats come up for election every six years including 2014. Class 3 Senate seats come up for election every six years including 2016.