Capito retreats from fight--Is her decision linked to her association with Delay?

Capito has announced she won't challenge Senator Byrd. The question is why? The suggestion is that her deep links to DeLay and the money she accepted from him heavily influenced her decision. Capito had until January to make her decision, so it is no coincidence that she is dropping out now that DeLay has been indicted. She may have some real explaining to do back home about her ties to DeLay and his money machine and may have a real challenge just to keep her seat.