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.
Waltz is running for Congress. Schneider is leaving after three terms to spend more time with his family business, Mister Ice of Indianapolis, and Miller, 79, is retiring after 34 years in office.
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.