Just Cochran. McDaniel runs an embarrassing campaign in the general with at least a few jaw-dropping comments, but Mississippi isn't Missouri or Indiana. He still heads to the Senate.
Mississippi -- Romney 55.3, Obama 43.8
Indiana -- Romney 54.0, Obama 43.8
Missouri -- Romney 53.6, Obama 44.3
McDaniel is not going to win. Whether Cochran or Childers wins next November depends on whether McDaniel makes a campaign-killing comment before the primary or after it.
McDaniel could lose to Childers, but I think Mississippi is probably less elastic than Indiana and Missouri. Then again, I could just not know anything about Mississippi.
You're right. It's two-thirds as elastic as Indiana and Missouri.