Indiana state Sen. Jim Arnold, a Democrat from LaPorte, says he won't run for re-election later this year.
The 71-year-old Arnold is the eighth state senator to announce he or she is retiring or running for another office. He previously had announced he would seek a third term, but said he changed his mind.
State Rep. David Niezgodski, a South Bend Democrat, has announced plans to run for the Senate seat being vacated by state Sen. John Broden, also a South Bend Democrat, who is running to become a St. Joseph circuit judge.
Others who have announced they won't seek re-election are Democrat Earline Rogers of Gary and Republicans Patricia Miller and Scott Schneider, both of Indianapolis; Brent Steele of Bedford; Brent Waltz of Greenwood; and Carlin Yoder of Middlebury.
Indianapolis City-County Councillor Aaron Freeman announced Wednesday morning that he would run for the Senate seat in District 32 in a bid to replace Miller. State Rep. Cindy Kirchhofer, a Beech Grove Republican, also is seeking the seat.
The Indiana Senate is composed of 50 members who serve four-year terms. Senate elections take place every two years, with 25 senators chosen in each election. Republicans gained a 40-10 edge in Senate seats in the 2014 election.
Read more stories about the 2016 election at our Ballot Box page.