Roll Call is reporting that Congresswoman Barbara Cubin (R-WY) will reportedly announce her retirement tomorrow.

Cubin has been absent from the House for much of the year, caring for her ill husband back home in Wyoming. Cubin had already been facing a primary challenge from state House Majority Leader Colin Simpson, the son of former U.S. Senator Alan Simpson (R-WY), as well as a second campaign from 2006 Democratic nominee Gary Trauner.

In Cubin's special case, the open seat might actually improve the GOP's chance of holding the seat. Despite representing an overwhelmingly Republican state, Cubin barely won re-election last year after she threatened to hit the Libertarian candidate — who was himself in a wheelchair.