Hotline OnCall's Reid Wilson, in explaining the replacement process for Sen. Robert Byrd, notes one potential Republican challenger for the seat:
GOPers, meanwhile, have been itching to get Rep. Shelley Moore Capito (R) on a statewide ballot. She is the highest-ranking GOPer in the state (All 6 statewide officials are Dems), and she's won repeatedly in the Second District, reaching from Charleston and the OH border to exurban MD and VA, even though Dems have targeted her for defeat. Byrd himself cut an ad for Capito's '08 Dem challenger, former Byrd aide Anne Barth (D). Capito won by a 57%-43% margin, better than Sen. John McCain's (R-AZ) margin in the district.
It looks like no one will get to mount a challenge anytime soon, though: Wilson explains that a special election is unlikely to be held this year, and that Byrd's appointed replacement will probably hold the office until 2012.