The Republican U.S. Senate primary is getting interesting. A new poll says former Sen. Dan Coats would beat Democrat Brad Ellsworth 54 to 33 percent, while former Rep. John Hostettler would beat him 50 to 30 percent, and state Sen. Marlin Stuzman would win just by a 41 to 36 percent margin. In a roundabout way, that makes Coats the front-runner, and none of it is good news for Ellsworth.