A few things to think about.
Kasich is a Koch pet... it would be interesting to know if this money was pulled after Trump made the comment about funding a pac to defeat Kasich.
Ron Johnson may well be a lost cause in WI. It is a super leftist area. And Wisconsin is a state that the democracy alliance has heavily invested so it isn't a free lunch. Walker is also a Koch pet and endorsed Trump... so it will be interesting to see if there is any change in the Koch/Walker relationship.
And it doesn't really make sense why Addelson would still be kicking it and the Koch's leave. The Koch's seem more focused on domestic policy, deregulation and tax cuts (although it very well may be the case Koch Industries servers the MiC.. even if by being a supplier for the big guys)... along with their crony-ism public-private ventures of course. And I think you'd be more likely to see tax cuts and deregulation under Trump.
The DA and the Koch's have been duking it out in a lot of states. Lets just hope they don't team up.