I have a prediction:
MO Senate 2016 will be the closest race in the nation. Even by raw votes. A recount will occur.
I'm actually predicting that as well, lol.
And regarding McCaskill... well, she's a moderate the same way Ron Johnson is a moderate. Fortunately, she doesn't have the necessary skills and charisma that Kander has to beat Ann Wagner in two years.
That requires Ann Wagner to actually win the Republican nomination. And I will not take part in predicting elections past this cycle.
All I would think is Wagner may be favored, particularly if Kander wins. I can not see MO sending two Democrats to Senate long term and an open MO-02 may be interesting, so long as Clinton popularity is not horrendous.
A lot of the MO GOP are mad at Wagner for dumping Trump. But I have actually respected her more since then.