From TPM Reader AB ...

I've read alot about Dr. Tiller having been the focus of the Operation Rescue terror operations in the '90s. However, I'd bet good money that the proximate trigger for this asassination was the right-wing publicity over Tiller as a benefactor of HHS Head Kathleen Sebelius when she was Governor of Kansas. That was the "hot button" that the right wing anti-choice crowd pressed. And this is the result. Google "tiller + sebelius" and you'll see what I mean.

I did. You can do the search by clicking here. Pretty interesting stuff.

One thing I confess I'd totally missed was that questions about donations from Tiller, his wife and affiliated groups were a major issue pressed by Republicans during Sebelius's confirmation hearings.