AP Via Huffpo:

Wyoming Sen. Craig Thomas, a three-term conservative Republican who stayed clear of the Washington limelight and political catfights, died Monday. He was 74.

The senator's family issued a statement saying he died Monday evening at National Naval Medical Center in Bethesda, Md. He had been receiving chemotherapy for acute myeloid leukemia.
Gov. Dave Freudenthal, a Democrat, will appoint a successor from one of three finalists chosen by the state Republican party. Read more...

Our heartfelt condolences go out to Senator Thomas' family and friends.