Politico's Josh Kraushaar reports:
Former Indiana Sen. Dan Coats plans to announce Wednesday that he will challenge Democratic Sen. Evan Bayh in November, a senior Republican official told POLITICO. Coats held the seat Bayh currently occupies for 10 years before retiring in 1998. Since leaving Congress, he has worked as a lobbyist and served as U.S. ambassador to Germany during the George W. Bush administration.