The AP is reporting that Rep. Dan Burton (R-Ind.) says he will not debate his primary opponents.

Burton was narrowly re-nominated in 2008 and faces four serious primary challengers this year. But he said his obligations in Washington and his town hall appearances should be enough for voters.

It's not unusual for an incumbent to decline debate invitations, but usually they cite scheduling conflicts instead of saying flat-out that they won't debate. And endangered incumbents generally will agree to some debates if they feel they are really in trouble.

In short, it's an interesting approach from Burton to rule out debates two and a half months before the May 4 primary. Look for his opponents to hit him hard for his stance.