Stutzman came under criticism during the primary after The Associated Press reported that he billed his campaign more than $2,000 in airfare for a family trip.
For some Stutzman loyalists, throwing their support behind Todd Young won’t be easy.
The current 9th District Indiana congressman moves on to face former 9th District Rep. Baron Hill.
Republican Reps. Marlin Stutzman and Todd Young are competing for the GOP spot on the November ballot.
FEC regulations forbid the use of campaign funds for personal expenses.
Political analysts question whether the debate will change the minds of undecided voters.
The commission voted two to two, meaning Young will remain on the ballot. Its ruling can be appealed in court.
Democrats claim Young doesn’t have the required number of signatures to be on the ballot and Stutzman is joining the challenge.
State GOP Chairman Eric Holcomb and Representatives Marlin Stutzman and Todd Young began defining themselves for their audience.
Sen. Dan Coats' seat is up for grabs after he announced earlier this year he is retiring.