The congresswoman will not run against Joe Manchin for Robert Byrd's Senate seat, says Aaron Blake at the Washington Post:

Rep. Shelley Moore Capito (R-W.Va.) has decided she will not run to replace Sen. Robert C. Byrd (D-W.Va.), three sources familiar with her plans said Tuesday night.

Capito was the favorite on the GOP side, and state legislators gained a concession in a special-election bill passed Monday that would have allowed her to run for both reelection and in the Senate race at the same time.

But, even with that fallback plan, sources tell The Fix that the she has opted not to run. That leaves Gov. Joe Manchin (D), who declared his candidacy Tuesday morning, as an even bigger favorite.

Capito's campaign could not be reached for comment late Tuesday night. She is slated to be on the radio Wednesday morning with West Virginia political analyst Hoppy Kercheval.