Republicans have their sights set on a two-thirds supermajority in the Indiana House following two years of walkouts by Democratic members over the right-to-work issue.
If Republicans can pick up seven additional seats in Tuesday's election, they would have the 67 members they need to take legislative action regardless of what the Democrats do.
House Democrats this summer ousted longtime leader Patrick Bauer in a dispute over campaign strategy to counter the Republican advantage from new GOP-drawn election districts and the decisions of 12 Democratic incumbents to not seek re-election.
Republicans currently have a 37-13 supermajority in the state Senate. Although Democrats are running aggressive challenges to some Republican senators, they face long odds in gaining the four seats they need to break the GOP supermajority.