Senatorial elections are not held at the end of every six-year term. they are actually scattered over the six-year term so that not all senators are up for re-election in the same year. how are senatorial elections spread out? a. approximately 1/6 of senators are up for re-election every year. b. approximately 1/3 of senators are up for re-election every two years. c. approximately 2/3 of senators are up for re-election every three years. d. approximately 1/2 of senators are up for re-election every three years.