Why is Heitkamp so vulnerable...

[Pericles]

McCaskill and Donnelly are certainly vulnerable too.

I didn’t say they weren’t vulnerable, just not compared to Heitkamp.

It does seem weird which suggests there is a polling error one way or another, either Heitkamp is losing by less(maybe low single digits) or McCaskill and Donnelly are more vulnerable and are underwater. After all Iowa polling a lot to the right of Wisconsin and Michigan etc ultimately did prove to be a bellwether and indicator Clinton would have trouble in her firewall.