Koster was unopposed in the Democratic primary. Four years ago, he won a Democratic contest that was close enough to allow for a recount.
Martin, who was chief of staff to former Gov. Matt Blunt, defeated Livingston County prosecutor Adam Warren in Tuesday’s GOP primary.
“The onslaught of regulations coming down the pike from unelected bureaucrats in Washington threatens Missourians’ jobs and pocketbooks,” Senator Bond said.
Livingston County Prosecutor Adam Warren joins St. Louis attorney Ed Martin in the GOP field.