Coats received the endorsement of the National Republican Senatorial Committee, which put him at odds with Stutzman's DeMint endorsement. But DeMint immediately threw his weight behind Coats after he won the primary. Now, Coats will face almost-certain Democratic nominee Rep. Brad Ellsworth in the November general election. They are competing to fill the seat left vacant by Democratic Sen. Evan Bayh's retirement. Coats currently enjoys a wide lead in the polls over Ellsworth.
There were also Democratic primaries in Ohio and North Carolina.